Title of Invention: Ether-amide compounds and uses thereof Abstract: Novel ether-amide compounds are described. Uses of the compounds, in particular as solvents, for example in phytosanitary formulations are also described. Detailed Description: Part general_description_paragraphs: Part CROSS-REFERENCE TO PRIORITY/PCT APPLICATIONS: This application is a National Stage of PCT/FR 2010/052212, filed Oct. 18, 2010, and designating the United States (published in the French language on Apr. 28, 2011, as WO 2011/048314 A1; the title and abstract were also published in English), which claims priority of FR 0905000, filed Oct. 19, 2009, each hereby expressly incorporated by reference in its entirety and each assigned to the assignee hereof. The object of the present invention is novel compounds of the ether amide type. Its object is also the uses of such compounds, notably as solvents, for example in phytosanitary formulations. The industry uses many chemical compounds as solvents, for example for preparing chemicals and materials, for formulating chemical compounds, or for treating surfaces. For example solvents are used for the formulation of phytosanitary actives notably in the form of emulsifiable concentrates (Emulsifiable Concentrate “EC”) intended to be diluted in water by the farmer, before application on a field. Solvents are used for the formulation of phytosanitary actives notably in the form of micro-emulsions (“ME”) or emulsions in water (Emulsion in Water “EW”) intended to be diluted in water by the farmer before application on a field. The industry is searching for novel compounds with which it is possible to vary or optimize the products and methods in which solvents, notably polar solvents, are to be used. The industry notably needs compounds with a moderate cost, having interesting properties of use. The industry also needs compounds having a toxicological and/or ecological profile perceived as being favorable, notably low volatility (low VOC), good biodegradability, low toxicity and/or low hazardous nature. The use of dimethylamides as solvents is known. These are products of formula R-CONMe2 wherein R is a hydrocarbon group such as an alkyl, typically a C6-C30 alkyl. Such products are notably marketed under the name of Genagen® by Clariant. These solvents find applications notably in the phytosanitary field. These solvents however have a restricted field of use and do not allow solubilization of certain phytosanitary actives at certain concentrations, in useful temperature ranges, without forming crystals. Documents WO 2007/107745, WO 2009/027624 and WO 2009/027626 (Syngenta) describe the use of lactamides (alpha-hydroxyamides) as a solvent notably in the phytosanitary field. There exists a need for other solvents. Document WO 2008/101629 (Cognis) describes the use of lactamides (alpha-hydroxyamides) as a solvent, notably in the phytosanitary field. There exists a need for other solvents. There also exists a need for plasticizers. Moreover, document U.S. Pat. No. 3,827,994 (Grace) describes useful compounds in aminoplast resin compositions for treating textiles or papers. The compounds are said to improve properties such as creasing resistance of textiles. The compound of formula CH3—CH(OMe)—CO—NMe2 is notably disclosed in column 26. Other properties or uses are not suggested. There remains a need for novel solvents, co-solvents, crystallization inhibitors, or plasticizers, notably in phytosanitary formulations, and for novel compounds which may notably widen the range of actives which may be formulated and/or their concentration and/or which may widen their conditions of use, notably in terms of stability for example without forming crystals at low temperature. The present invention meets at least one of the needs expressed above by proposing the use as a solvent, co-solvent, crystallization inhibitor, or plasticizer, of a compound of the following formula (I): RaRbC(OR1)—CONR2R3 (I) wherein Ra and Rb, either identical or different, are groups selected from hydrogen and linear or branched, preferably C1-C6, preferably C1-C3 alkyl groups, R1 is a group R′1 ou -(AO)nR′1, wherein R′1 is a group selected from hydrocarbon groups comprising an average number of carbon atoms ranging from 1 to 36, preferably from 1 to 15, either saturated or unsaturated, either linear or branched, optionally cyclic, optionally aromatic, said aromatic groups may comprise a heteroatom in an aromatic ring, AO, either identical or different, represents a group of formula —CH2—CH2—O—, —CHMe-CH2—O—, or —CH2—CHMe-O— n is an average number greater than or equal to 0, ranging for example from 0 to 50, R2 and R3, either identical or different are groups selected from hydrogen and hydrocarbon groups comprising an average number of carbon atoms ranging from 1 to 36, preferably from 1 to 15, either saturated or unsaturated, either linear or branched, optionally cyclic, optionally aromatic, optionally substituted, R2 and R3 may optionally form together a cycle comprising the nitrogen atom to which they are bound, optionally substituted and/or optionally comprising an additional heteroatom, R2 and R3 are not simultaneously hydrogen atoms, with the proviso that if Ra=Rb=H, the compound of formula (I) is used in a phytosanitary formulation. The present invention relates to the use as a solvent, co-solvent, crystallization inhibitor, or plasticizer, of a compound of the following formula (I): RaRbC(OR1)—CONR2R3 (I) wherein Raand Rb, either identical or different are groups selected from hydrogen and linear or branched, preferably C1-C6, preferably C1-C3 alkyl groups, R1 is a R′1 or -(AO)nR′1 group, wherein R′1 is a group selected from hydrocarbon groups comprising an average number of carbon atoms ranging from 1 to 36, preferably from 1 to 15, either saturated or unsaturated, either linear or branched, optionally cyclic, optionally aromatic, said aromatic groups may comprise a heteroatom in an aromatic ring, AO, either identical or different, represents a group of formula —CH2—CH2—O—, —CHMe-CH2—O—, or —CH2—CHMe-O— n is an average number greater than or equal to 0, ranging for example from 0 to 50, R2 and R3, either identical or different are hydrocarbon groups comprising an average number of carbon atoms ranging from 1 to 36, preferably from 1 to 15, either saturated or unsaturated, either linear or branched, optionally cyclic, optionally aromatic, optionally substituted, R2 and R3 may optionally form together a cycle comprising a nitrogen atom to which they are bound, optionally substituted and/or optionally comprising an additional heteroatom, with the proviso that if Ra=Rb=H, the compound of formula (I) is used in a phytosanitary formulation. The object of the invention is also a method for preparing the compound. The object of the invention is also the use of the compound as a surfactant, solvent, co-solvent, stripping agent, crystallization inhibitor, cleaning agent, degreasing agent, plasticizer or coalescence agent. The object of the invention is also a method for solvatation, co-solvatation, plastification, coalescence and/or crystallization inhibition by adding the compound of the invention. The object of the invention is also formulations comprising the compound of the invention. The formulations may notably be phytosanitary formulations. The object of the present invention is also novel compounds, which may be particularly suitable for uses, for methods or for applying formulations as mentioned above. Definitions or Abbreviations In the present application, the following abbreviations are used: Me means methyl, Et means ethyl; IsoAm means Isoamyl, cyclo or Cy means cyclohexyl. In the present application by “compound of the invention”, is meant a compound of formula (I). In the present application, by “novel compounds of the invention” are meant certain compounds of formula (I). In the present application, by “material composition” is meant a more or less complex composition comprising several chemical compounds. This may be typically a non-purified or moderately purified reaction product. The compound of the invention may notably be isolated and/or marketed and/or used as a material composition comprising it. The compound of the invention, in the form of a pure molecule or in the form of a mixture fitting formula (I), may be comprised in a material composition. In the present application the term of solvent is understood in a broad sense, notably covering the functions of co-solvent, crystallization inhibitor, stripping agent. The term of solvent may notably designate a liquid product at the temperature of use, preferably with a melting point of less than or equal to 20° C., preferably 5° C., preferably 0° C., which may contribute to liquefying a solid material, or to preventing or delaying solidification or crystallization of material in a liquid medium. In the present application, the expression “hydrocarbon groups” notably designates saturated or unsaturated, linear or branched acyclic aliphatic groups, or saturated, unsaturated or aromatic, monocyclic or polycyclic, carbocyclic or heterocyclic groups, or further linkings of said groups. Compound of the Invention The compound of the invention has the general formula (I) given above. It is noted that this may be a mixture of several compounds of general formula (I). In other words, the compound may be alone or as a mixture. Within the scope of mixtures of several compounds, the numbers of atoms or units may be expressed as average numbers. These are number average numbers. In the case of single compounds, they will generally be integers, as regards the number of carbon atoms. The groups Ra and Rb, either identical or different are groups selected from hydrogen and linear or branched alkyl groups. The alkyls may notably be C1-C6, preferably C1-C4 and preferentially C1-C3 alkyls. These may notably be methyl, ethyl, propyl or butyl groups. According to a particular embodiment, the total number of carbon atoms (in the compound of formula (I)) excluding the groups R1, R2 and R3, is 2, 3, 4, 5, 6, 7 or 8, or average numbers between each of these values. It is mentioned that according to a particular embodiment, at least one of the groups selected from Ra and Rb is different from hydrogen, for example a group selected from linear or branched alky groups. The alkyls may notably be C1-C6, preferably C1-C4 and preferentially C1-C3 alkyls. These may notably be methyl, ethyl, propyl or butyl groups. According to a particular embodiment, the total number of carbon atoms excluding the groups R1, R2 and R3 is 2, 3, 4, 5, 6, 7, or 8 or average numbers between each of these values. For example Ra=Me or Et, and Rb═H. It is mentioned that R2 may be a group selected from linear or branched alkyl groups, the alkyls may notably be C1-C6, preferably C1-C4 and preferentially C1-C3 alkyls. These may notably be methyl, ethyl, propyl or butyl groups. According to a particular embodiment, the total number of carbon atoms, excluding the groups R1, R2 and R3 is 3, 4, 5, 6, 7 or 8 or average numbers between each of these values. It is mentioned that Rb may be a group selected from hydrogen and linear or branched alkyl groups. The alkyls may notably be C1-C6, preferably C1-C4 and preferentially C1-C3 alkyls. These may notably be methyl, ethyl, propyl or butyl groups. According to a particular embodiment, the total number of carbon atoms, excluding the groups R1, R2 and R3 is 2, 3, 4, 5, 6, 7 or 8 or average numbers between each of these values. Rb is preferably a hydrogen. According to a particular embodiment: Ra is a group selected from linear or branched alkyl groups. The alkyls may notably be C1-C6, preferably C1-C3 alkyls. These may notably be methyl or ethyl groups. According to a particular embodiment, the total number of carbon atoms, excluding the groups R1, R2 and R3 is 3, 4, 5, 6 , 7, or 8. Rb is a group selected from hydrogen and linear or branched alkyl groups. The alkyls may notably be C1-C6, preferably C1-C3 alkyls. These may notably be methyl or ethyl groups. According to a particular embodiment, the total number of carbon atoms, excluding the groups R1, R2 and R3 is 3, 4, 5, 6, 7, or 8. Rb is preferably a hydrogen. The embodiment wherein Ra=Me, and Rb═H, may correspond to compounds derived from lactic acid of formula CH3—CHOH—COOH with an ether —OR1 in the place of the hydroxyl and an amide —CONR2R3 in the place of the acid —COOH. According to a particular embodiment, the compounds of formula (I) are characterized in that Ra is a linear or branched C1-C6 alkyl group, and Rb is H or a linear or branched C1-C6 alkyl group. Such compounds are also called ‘branched compounds’. The present invention therefore according to an advantageous embodiment relates to the use as a solvent, co-solvent, crystallization inhibitor, or plasticizer, of a compound of the following formula (I): RaRbC(OR1)—CONR2R3 (I) wherein Ra is a linear or branched C1-C6 alkyl group, Rb is H or a linear or branched C1-C6 alkyl group, R1 is a group R′1 or -(AO)nR′1, wherein R′1 is a group selected from hydrocarbon groups comprising an average number of carbon atoms ranging from 1 to 15, optionally substituted, selected from the saturated or unsaturated, linear or branched acyclic aliphatic groups, saturated, unsaturated or aromatic, monocyclic or polycyclic, carbocyclic or heterocyclic groups, and the linkings of said groups, AO, either identical or different, represents a group of formula —CH2—CH2—O—, —CHMe-CH2—O—, or —CH2—CHMe-O— n is an average number greater than or equal to 0, ranging for example from 0 to 50, R2 and R3, either identical or different are hydrocarbon groups comprising an average number of carbon atoms ranging from 1 to 15, optionally substituted, selected from saturated or unsaturated, linear or branched acyclic aliphatic groups, saturated, unsaturated or aromatic, monocyclic or polycyclic, carbocyclic or heterocyclic groups and the linkings of said groups, R2 and R3 may optionally form together a cycle comprising the nitrogen atom to which they are bound, optionally substituted and/or optionally comprising an additional heteroatom. According to a particular embodiment, “G” for the compound of the invention, Ra=Me, Rb=H and R1 is a group different from the methyl group. All the following in this paragraph relates to this particular embodiment “G”. According to a particular embodiment, Ra=Me, Rb=H and R1 is a group different from n-butyl. According to a particular embodiment Ra=Me, Rb=H and R1 is an alkyl group comprising from 2 to 5 carbon atoms, excluding n-butyl, for example an ethyl, n-propyl, isopropyl, isobutyl, tertbutyl, n-pentyl, isopentyl, isoamyl group. According to a particular embodiment Ra=Me, Rb=H and R1 is a cyclic group preferably a cyclohexyl group. According to a particular embodiment, R1 is a group different from a methyl group. According to a particular embodiment, R1 is a group different from n-butyl. According to a particular embodiment R1 is a cyclic group, preferably a cyclohexyl group. According to a particular embodiment R1 is an alkyl group comprising from 2 to 5 carbon atoms, excluding n-butyl, for example an ethyl, n-propyl, isopropyl, isobutyl, tertbutyl, n-pentyl, isopentyl, isoamyl group. According to a particular embodiment Ra=Me, Rb=H and if R1 is an alkyl group, it then comprises more than 5 carbon atoms, R1 may for example be an n-hexyl, cyclohexyl, n-octyl, isooctyl, 2-ethylhexyl, decyl, dodecyl, tridecyl, phenyl or benzyl group. According to a particular embodiment Ra=Me, Rb=H and R1 is an alkyl group comprising more than 5 carbon atoms. It is mentioned that according to another particular embodiment Ra=Rb=H. This embodiment may correspond to compounds derived from glycolic acid of formula CH2OH—COOH with an ether —OR1 in the place of the hydroxyl and an amide —ONR2R3 in the place of the acid —COOH. According to an embodiment, the compounds of formula (I) are characterized in that Ra and Rb are H. Such compounds are also called ‘linear compounds’. Thus, according to a particular embodiment, the present invention relates to the use as a solvent, co-solvent, crystallization inhibitor, or plasticizer, in a phytosanitary formulation, of a compound of the following formula (I-1): R1O—H2C—CONR2R3 (I-1) wherein R1 is a group R′1 or -(AO)nR′1, wherein R′1 is a group selected from hydrocarbon groups comprising an average number of carbon atoms ranging from 1 to 15, optionally substituted, selected from saturated or unsaturated, linear or branched acyclic aliphatic groups, saturated, unsaturated or aromatic, monocyclic or polycyclic, carbocyclic or heterocyclic groups, and the linkings of said groups, AO, either identical or different, represents a group of formula —CH2—CH2—O—, —CHMe-CH2—O—, or —CH2—CHMe-O— n is an average number greater than or equal to 0, R2 and R3, either identical or different, are hydrocarbon groups comprising an average number of carbon atoms ranging from 1 to 15, optionally substituted, selected from saturated or unsaturated, linear or branched acyclic aliphatic groups, saturated, unsaturated or aromatic, monocyclic or polycyclic, carbocyclic or heterocyclic groups and the linkings of said groups, R2 and R3 may optionally form together a cycle comprising the nitrogen atom to which they are bound optionally substituted and/or optionally comprising an additional heteroatom. According to a particular embodiment Ra=Rb=H and R1 is a cyclic group, preferably a cyclohexyl group. The compounds having such a group have particularly interesting solvating properties and/or miscibility properties in water, notably within the scope of phytosanitary formulations. According to a particular embodiment “I” for the compound of the invention, Ra=Rb=H and R1 is a group different from the methyl group. All the following in this paragraph relates to this particular embodiment “I”. According to a particular embodiment Ra=Rb=H and R1 is a group different from n-butyl. According to a particular embodiment Ra=Rb=H and R1 is an alkyl group comprising from 2 to 8 carbon atoms, excluding n-butyl, for example an ethyl, n-propyl, isopropyl, isobutyl, tertbutyl, n-pentyl, isopentyl, isoamyl, n-hexyl, cyclohexyl, n-octyl, isooctyl, 2-ethylhexyl group. According to a particular embodiment Ra=Rb=H and R1 is a cyclic group, preferably a cyclohexyl group. According to a particular embodiment, R1 is a group different from the methyl group. According to a particular embodiment, R1 is a group different from n-butyl. According to a particular embodiment, R1 is a cyclic group, preferably a cyclohexyl group. According to a particular embodiment, R1 is an alkyl group comprising from 2 to 8 carbon atoms, excluding n-butyl, for example an ethyl, n-propyl, isopropyl, isobutyl, tertbutyl, n-pentyl, isopentyl, isoamyl, n-hexyl, cyclohexyl, n-octyl, isooctyl, 2-ethylhexyl group. According to a particular embodiment Ra=Rb=H and if R1 is an alkyl group it then comprises more than 8 carbon atoms, R1 may for example be a decyl, dodecyl, tridecyl, phenyl or benzyl group. According to a particular embodiment Ra=Rb=H and R1 is an alkyl group, comprising more than 8 carbon atoms. In formula (I), the groups R2 and R3, either identical or different are groups selected from hydrogen and hydrocarbon groups comprising an average number of carbon atoms ranging from 1 to 36, either saturated or unsaturated, either linear or branched, optionally cyclic, optionally aromatic, optionally substituted, R2 and R3 may optionally form together a cycle comprising the nitrogen atom to which they are bound, optionally substituted and/or optionally comprising an additional heteroatom. It should be noted that R2 and R3 are not simultaneously hydrogens. In other words, the group —CONR2R3 is not a group —CONH2. This may be a group —CONHR2 wherein R2 is not a hydrogen, or a group —CONR2R3 wherein R2 and R3 are not hydrogens. R2 and R3, either identical or different, may for example be selected from methyl, ethyl, propyl (n-propyl), isopropyl, n-butyl, isobutyl, n-pentyl, amyl, isoamyl, hexyl, cyclohexyl groups, mixtures and/or combinations thereof. R2 and R3 may also be such that they form together with the nitrogen atom, a morpholine pyrrolidine, piperazine or piperidine group. R2 and R3 may notably be ethyl groups, preferably both of them. The group R1 is a group typically corresponding to an alcohol R1—OH. In one case, it may correspond to a simple alcohol R′1—OH. In another case, it may correspond to an ethoxylated and/or propoxylated alcohol of formula HO-(AO)nR′1. R′1 represents the hydrocarbon radical of these optionally ethoxylated and/or propoxylated alcohols. The group R′1 is a group selected from hydrocarbon groups comprising an average number of carbon atoms ranging from 1 to 36, either saturated or unsaturated, either linear or branched, optionally cyclic, optionally aromatic, said aromatic groups may comprise a heteroatom in an aromatic ring. The heteroatom of the aromatic group may be an oxygen or nitrogen atom. It is mentioned that the aromatic group may be directly bound through or borne by an alkyl group. It is mentioned that the cyclic or aromatic groups may be substituted. R′1 may for example be selected from methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, n-pentyl, isopentyl, isoamyl, n-hexyl, cyclohexyl, n-octyl, isooctyl, 2-ethylhexyl, decyl, dodecyl, tridecyl, phenyl, benzyl groups and mixtures thereof. It is noted that R′1 may be a more or less complex mixture, which may correspond to the application of a more or less complex mixture of alcohols R1—OH, for example fusel oil. According to a particular embodiment, the group R1 is a cyclic group, preferably a cyclohexyl group. The group (AO) represents an ethoxy group of formula —CH2—CH2—O—or a propoxy group of formula —CHMe-CH2—O—, or —CH2—CHMe-O—. The number n is an average number greater than or equal to 0, for example ranging from 0 to 50. It typically represents a degree of ethoxylation and/or propoxylation. In the case when ethoxy and propoxy groups are present, they may be distributed randomly or in a sequenced way. The compound of the invention is preferably such that it has a melting point of less than or equal to 20° C., preferably 5° C., preferably 0° C. The groups detailed above are preferably such that the compound has this property. According to an embodiment, the compound of the invention may be totally miscible in water. According to a particular embodiment, the compound of the invention is partly miscible in water. The miscibility in water may for example be less than 10% by weight (at 25° C.), preferably 2%, preferably 1% or 0.1%. It may be greater than 0.001%, preferably 0.01% or 0.1%. For example, it may be comprised between 0.01% and 2%, for example between 0.1% and 1%. Surprisingly, the compounds of the invention have good solvating properties, notably for phytosanitary actives in phytosanitary formulations with low miscibility in water. The groups Ra, Rb, and/or the group R1 and/or the groups R2, R3 may be selected so as to control the miscibility in water. The compound of the invention may notably have one of the following formulae: The compound of the invention may notably be one of the novel compounds of the invention, detailed below. It is mentioned that the compound of the invention may be comprised in a material composition, comprising products other than the compound alone or as a mixture fitting formula (I). In the material composition, the compound of the invention may account for at least 10% by weight. Preferably, this is the main compound of the material composition. By main compound in the present application is meant the compound for which the content is the highest, even if its content is less than 50% by weight (for example in a mixture of 40% of A, 30% of B, and 30% of C, product A is the main compound). Even more preferably, the compound of the invention accounts for at least 50% by weight of the material composition, for example from 70 to 95% by weight, and even from 75 to 90% by weight. As indicated above, the material composition may be a reaction product. The other products of the material composition may notably be byproducts of impurities, of unreacted products, or products corresponding to reaction adducts of products comprised in the initial compounds not leading to the compounds of formula (I). Novel Compounds of the Invention The invention also relates to certain novel compounds of formula (I). These particular novel compounds may be applied as compounds of the invention. The novel compounds are the following compounds of formula (I): RaRbC(OR1)—CONR2R3 (I) wherein Ra, Rb, either identical or different, are groups selected from hydrogen and linear or branched, preferably C1-C3 alkyl groups, R1 is a group R′1 or -(AO)nR′1, wherein R′1 is a group selected form hydrocarbon groups comprising an average number of carbon atoms ranging from 1 to 36, either saturated or unsaturated, either linear or branched, optionally cyclic, optionally aromatic, said aromatic groups may comprise a heteroatom in an aromatic ring, AO, either identical or different, represents a group of formula —CH2—CH2—O—, —CHMe-CH2—O—, or —CH2—CHMe-O— n is an average number greater than or equal to 0, ranging for example from 0 to 50, R2 and R3, either identical or different, are groups selected from hydrogen and hydrocarbon groups comprising an average number of carbon atoms ranging from 1 to 36, either saturated or unsaturated, either linear or branched, optionally cyclic, optionally aromatic, optionally substituted, R2 and R3 may optionally form together a cycle comprising the nitrogen atom to which they are bound, optionally substituted and/or optionally comprising an additional heteroatom, R2 and R3 are not hydrogens simultaneously, with the following conditions: if Ra=Rb=H, then R1 is a group different from methyl or n-butyl groups, if Ra=Me and Rb=H, then R1 is a group different from methyl or n-butyl groups. Preferably, R1 is a group different from methyl or n-butyl groups in every case. What was indicated for the groups Ra, Rb and R1 of the compounds of the invention may be applied to the novel compounds, to the extent that the above conditions are observed. According to a particular embodiment, the present invention relates to novel branched compounds. Thus, the present invention relates to compounds of the following formula (I): RaRbC(OR1)—CONR2R3 (I) wherein Ra is a linear or branched C1-C6 alkyl group, Rb is H or a linear or branched C1-C6 alkyl group R1 is a group R′1 or -(AO)nR1, wherein R′1 is a group selected from hydrocarbon groups comprising an average number of carbon atoms ranging from 1 to 15, optionally substituted, selected from either saturated or unsaturated, linear or branched acyclic aliphatic groups, saturated, unsaturated or aromatic, monocyclic or polycyclic, carbocyclic or heterocyclic groups, and the linkings of said groups, AO, either identical or different, represents a group of formula —CH2—CH2—O—, —CHMe-CH2—O—, or —CH2—CHMe-O— n is an average number greater than or equal to 0, R2 and R3, either identical or different, are hydrocarbon groups comprising an average number of carbon atoms ranging from 1 to 15, optionally substituted, selected from saturated or unsaturated, linear or branched acyclic or aliphatic groups, saturated, unsaturated or aromatic monocyclic or polycyclic, carbocyclic or heterocyclic groups and the linkings of said groups, R2 and R3 may optionally form together a cycle comprising the nitrogen atom to which they are bound, optionally substituted and/or optionally comprising an additional heteroatom, and with the following conditions: if Ra=Me and Rb=H, then R1 is a group different from methyl, n-butyl, benzyl or t-butyl groups, Notably, according to a particular embodiment “G” for the compound of the invention, Ra=Me, Rb=H and R1 is a group different from a methyl group. All the following in this paragraph relates to this particular embodiment “G”. According to a particular embodiment, Ra=Me, Rb=H and R1 is a group different from n-butyl. According to a particular embodiment Ra=Me, Rb=H and R1 is a group different from t-butyl or benzyl. According to a particular embodiment Ra=Me, Rb=H and R1 is an alkyl group comprising from 2 to 5 carbon atoms, excluding n-butyl or t-butyl, for example an ethyl, n-propyl, isopropyl, isobutyl, n-pentyl, isopentyl, isoamyl group. According to a particular embodiment Ra=Me, Rb=H and R1 is a cyclic group, preferably a cyclohexyl group. According to a particular embodiment R1 is a group different from a methyl group According to a particular embodiment, R1 is a group different from n-butyl. According to a particular embodiment, R1 is a cyclic group, preferably a cyclohexyl group. According to a particular embodiment, R1 is an alkyl group comprising from 2 to 5 carbon atoms, excluding n-butyl, for example an ethyl, n-propyl, isopropyl, isobutyl, tertbutyl, n-pentyl, isopentyl, isoamyl group. According to a particular embodiment Ra=Me, Rb=H and if R1 is an alkyl group, it then comprises more than 5 carbon atoms, R1 may for example be a n-hexyl, cyclohexyl, n-octyl, isooctyl, 2-ethylhexyl, decyl, dodecyl, tridecyl or phenyl group. According to a particular embodiment Ra=Me, Rb=H and R1 is an alkyl group, comprising more than 5 carbon atoms. According to a particular embodiment, R1 is an alkyl group comprising from 2 to 5 carbon atoms, excluding t-butyl or n-butyl, for example an ethyl, n-propyl, isopropyl, isobutyl, n-pentyl, isopentyl, or isoamyl group. According to a particular embodiment, R1 is an alkyl group comprising from 3 to 5 carbon atoms, excluding t-butyl or n-butyl, for example an n-propyl, isopropyl, isobutyl, n-pentyl, isopentyl, or isoamyl group. Among the preferred branched compounds, R1 is a linear or branched alkyl group comprising more than 5 carbon atoms. More particularly, the preferred branched compounds according to the present invention are characterized in that R2 is a linear or branched C1-C3 alkyl group and in that Rb is H or a linear or branched C1-C3 alkyl group. The preferred branched compounds are compounds of formula (I) as defined above, wherein: Ra=Me, Et, n-Pr or n-Bu, and Rb=H. According to a more preferred embodiment, the branched compounds of the invention are characterized in that R2 and R3 are methyl groups. Preferably, in formula (I) of the novel branched compounds according to the present invention, R′1 is selected from ethyl, propyl, isopropyl, n-pentyl, isopentyl, isoamyl, n-hexyl, cyclohexyl, n-octyl, isooctyl, 2-ethylhexyl, decyl, dodecyl, tridecyl and 1-phenylethyl groups. A preferred family of novel branched compounds according to the present invention consists of compounds of formula (I) as defined above wherein R1 is a methyl or ethyl group. Among the preferred branched compounds, mention may be made of the compounds of formula (I) as defined above wherein R2 is an alkyl group comprising 2, 3 or 4 carbon atoms. Another family of branched compounds according to the present invention consists of compounds of formula (I) as defined above wherein Ra is an alkyl group comprising 2, 3 or 4 carbon atoms and R2 and R3 are methyl groups. Another family of branched compounds according to the present invention consists of compounds of formula (I) as defined above wherein Ra is an alkyl group comprising 2, 3 or 4 carbon atoms and R1 is a methyl or ethyl group. Preferably, for these preferred compounds, R2 and R3 are methyl groups. A preferred family of the novel branched compounds according to the present invention consists of compounds of formula (I) as defined above wherein R1 is a branched alkyl group other than a t-butyl group, optionally substituted with a phenyl group. A preferred family of the novel branched compounds according to the present invention consists of compounds of formula (I) as defined above wherein R1 is a cycloalkyl group. Among the preferred branched compounds, mention may notably be made of the following compounds: According to another particular embodiment, the present invention relates to novel linear compounds. Thus the present invention also relates to compounds of the following formula (I-1): R1O—H2C—CONR2R3 (I-1) wherein R1 is a R′1 or -(AO)nR′1 group, wherein R′1 is a group selected from hydrocarbon groups comprising an average number of carbon atoms ranging from 1 to 15, optionally substituted, selected from saturated or unsaturated, linear or branched acyclic aliphatic groups, saturated, unsaturated or aromatic, monocyclic or polycyclic, carbocyclic or heterocyclic groups and the linkings of said groups, AO, either identical or different, represents a group of formula —CH2—CH2—O—, —CHMe-CH2—O—, or —CH2—CHMe-O— n is an average number greater than or equal to 0, for example ranging from 0 to 50, R2 and R3, either identical or different, are hydrocarbon groups comprising an average number of carbon atoms ranging from 1 to 15, optionally substituted, selected from saturated or unsaturated, linear or branched acyclic aliphatic groups, saturated, unsaturated or aromatic, monocyclic or polycyclic, carbocyclic or heterocyclic groups and the linkings of said groups, with the following conditions: R1 is a group different from methyl, phenyl, or n-butyl groups. Notably according to a particular embodiment “I” for the compound of the invention, Ra=Rb=H and R1 is a group different from a methyl group. All the following in this paragraph relates to this particular embodiment “I”. According to a particular embodiment, Ra=Rb=H and R1 is a group different from n-butyl. According to a particular embodiment Ra=Rb=H and R1 is a group different from phenyl. According to a particular embodiment, Ra=Rb=H and R1 is an alkyl group comprising from 2 to 8 carbon atoms, excluding n-butyl, for example an ethyl n-propyl, isopropyl, isobutyl, tertbutyl, n-pentyl, isopentyl, isoamyl, n-hexyl, cyclohexyl, n-octyl, isooctyl, 2-ethylhexyl group. According to a particular embodiment, Ra=Rb=H and R1 is a cyclic group, preferably a cyclohexyl group. According to a particular embodiment, R1 is a group different from a methyl group. According to a particular embodiment, R1 is a group different from n-butyl. According to a particular embodiment, R1 is a cyclic group, preferably a cyclohexyl group. According to a particular embodiment, R1 is an alkyl group comprising from 2 to 8 carbon atoms, excluding n-butyl, for example an ethyl, n-propyl, isopropyl, isobutyl, tertbutyl, n-pentyl, isopentyl, isoamyl, n-hexyl, cyclohexyl, n-octyl, isooctyl, 2-ethylhexyl group. According to a particular embodiment, Ra=Rb=H and if R1 is an alkyl group, it then comprises more than 8 carbon atoms, R1 may for example be a decyl, dodecyl, tridecyl, or benzyl group. According to a particular embodiment Ra=Rb=H and R1 is an alkyl group, comprising more than 8 carbon atoms. A particular family of linear compounds according to the present invention consists of compounds of formula (I-1) as defined above wherein R2 and R3 are methyl groups. Preferably, in the formula (I-1) as defined above R′1 is selected from ethyl, propyl, isopropyl, n-pentyl, isopentyl, isoamyl, n-hexyl, cyclohexyl, n-octyl, isooctyl, 2-ethylhexyl, decyl, dodecyl, tridecyl and 1-phenylethyl groups. A particular family of linear compounds according to the present invention consists of compounds of formula (I-1) as defined above wherein R1 is a cyclohexyl or n-decyl group. Another preferred family of linear compounds according to the present invention consists of compounds of formula (I-1) as defined above wherein R1 is a cycloalkyl group, R2 and R3 preferably being methyl groups. Another preferred family of linear compounds according to the present invention consists of compounds of formula (I-1) as defined above wherein R1 is an alkyl group comprising at least 8 carbon atoms, and notably 10 carbon atoms. Another preferred family of linear compounds according to the present invention consists of compounds of formula (I-1) as defined above wherein R1 is an alkyl group comprising at least 8 carbon atoms, and R2 and R3 are methyl groups. Among the preferred linear compounds, mention may notably be made of the following compounds: Examples of novel compounds of the invention are the following: CH3—CH(O-Et)-CONMe2 CH3—CH(O-n-propyl)-CONMe2 CH3—CH(O-isopropyl)-CONMe2 CH3—CH(O-isobutyl)-CONMe2 CH3—CH(O-n-pentyl)-CONMe2 CH3—CH(O-isopentyl)-CONMe2 CH3—CH(O-isoamyl)-CONMe2 CH3—CH(O-n-hexyl)-CONMe2 CH3—CH(O-cyclohexyl)-CONMe2 CH3—CH(O-n-octyl)-CONMe2 CH3—CH(O-isooctyl)-CONMe2 CH3—CH(O-2-ethylhexyl)-CONMe2 CH3—CH(O-decyl)-CONMe2 CH3—CH(O-dodecyl)-CONMe2 CH3—CH(O-phenyl)-CONMe2 CH2(O-Et)-CONMe2 CH2(O-n-propyl)-CONMe2 CH2(O-isopropyl)-CONMe2 CH2(O-isobutyl)-CONMe2 CH2(O-tertbutyl)-CONMe2 CH2(O-n-pentyl)-CONMe2 CH2(O-isopentyl)-CONMe2 CH2(O-isoamyl)-CONMe2 CH2(O-n-hexyl)-CONMe2 CH2(O-cyclohexyl)-CONMe2 CH2(O-n-octyl)-CONMe2 CH2(O-isooctyl)-CONMe2 CH2(O-2-ethylhexyl)-CONMe2 CH2(O-decyl)-CONMe2 CH2(O-dodecyl)-CONMe2 CH2(O-benzyl)-CONMe2 (CH3)2C(O-Me)-CONMe2 (CH3)2C(O-Et)-CONMe2 (CH3)2C(O-n-propyl)-CONMe2 (CH3)2C(O-isopropyl)-CONMe2 (CH3)2C(O-n-butyl)-CONMe2 (CH3)2C(O-isobutyl)-CONMe2 (CH3)2C(O-tertbutyl)-CONMe2 (CH3)2C(O-n-pentyl)-CONMe2 (CH3)2C(O-isopentyl)-CONMe2 (CH3)2C(O-isoamyl)-CONMe2 (CH3)2C(O-n-hexyl)-CONMe2 (CH3)2C(O-cyclohexyl)-CONMe2 (CH3)2C(O-n-octyl)-CONMe2 (CH3)2C(O-isooctyl)-CONMe2 (CH3)2C(O-2-ethylhexyl)-CONMe2 (CH3)2C(O-decyl)-CONMe2 (CH3)2C(O-dodecyl)-CONMe2 (CH3)2C(O-phenyl)-CONMe2 (CH3)2C(O-benzyl)-CONMe2 CH3—CH2—CH(O-Me)-CONMe2 CH3—CH2—CH(O-Et)-CONMe2 CH3—CH2—CH(O-n-propyl)-CONMe2 CH3—CH2—CH(O-isopropyl)-CONMe2 CH3—CH2—CH(O-n-butyl)-CONMe2 CH3—CH2—CH(O-isobutyl)-CONMe2 CH3—CH2—CH(O-tertbutyl)-CONMe2 CH3—CH2—CH(O-n-pentyl)-CONMe2 CH3—CH2—CH(O-isopentyl)-CONMe2 CH3—CH2—CH(O-isoamyl)-CONMe2 CH3—CH2—CH(O-n-hexyl)-CONMe2 CH3—CH2—CH(O-cyclohexyl)-CONMe2 CH3—CH2—CH(O-n-octyl)-CONMe2 CH3—CH2—CH(O-isooctyl)-CONMe2 CH3—CH2—CH(O-2ethylhexyl)-CONMe2 CH3—CH2—CH(O-decyl)-CONMe2 CH3—CH2—CH(O-dodecyl)-CONMe2 CH3—CH2—CH(O-phenyl)-CONMe2 CH3—CH2—CH(O-benzyl)-CONMe2 CH3—CH2—CMe(O-Me)-CONMe2 CH3—CH2—CMe(O-Et)-CONMe2 CH3—CH2—CMe(O-n-propyl)-CONMe2 CH3—CH2—CMe(O-isopropyl)-CONMe2 CH3—CH2—CMe(O-n-butyl)-CONMe2 CH3—CH2—CMe(O-isobutyl)-CONMe2 CH3—CH2—CMe(O-tertbutyl)-CONMe2 CH3—CH2—CMe(O-n-pentyl)-CONMe2 CH3—CH2—CMe(O-isopentyl)-CONMe2 CH3—CH2—CMe(O-isoamyl)-CONMe2 CH3—CH2—CMe(O-n-hexyl)-CONMe2 CH3—CH2—CMe(O-cyclohexyl)-CONMe2 CH3—CH2—CMe(O-n-octyl)-CONMe2 CH3—CH2—CMe(O-isooctyl)-CONMe2 CH3—CH2—CMe(O-2-ethylhexyl)-CONMe2 CH3—CH2—CMe(O-decyl)-CONMe2 CH3—CH2—CMe(O-dodecyl)-CONMe2 CH3—CH2—CMe(O-phenyl)-CONMe2 CH3—CH2—CMe(O-benzyl)-CONMe2 (CH3—CH2)2C(O-Me)-CONMe2 (CH3—CH2)2C(O-Et)-CONMe2 (CH3—CH2)2C(O-n-propyl)-CONMe2 (CH3—CH2)2C(O-isopropyl)-CONMe2 (CH3—CH2)2C(O-n-butyl)-CONMe2 (CH3—CH2)2C(O-isobutyl)-CONMe2 (CH3—CH2)2C(O-tertbutyl)-CONMe2 (CH3—CH2)2C(O-n-pentyl)-CONMe2 (CH3—CH2)2C(O-isopentyl)-CONMe2 (CH3—CH2)2C(O-isoamyl)-CONMe2 (CH3—CH2)2C(O-n-hexyl)-CONMe2 (CH3—CH2)2C(O-cyclohexyl)-CONMe2 (CH3—CH2)2C(O-n-octyl)-CONMe2 (CH3—CH2)2C(O-isooctyl)-CONMe2 (CH3—CH2)2C(O-2-ethylhexyl)-CONMe2 (CH3—CH2)2C(O-decyl)-CONMe2 (CH3—CH2)2C(O-dodecyl)-CONMe2 (CH3—CH2)2C(O-phenyl)-CONMe2 (CH3—CH2)2C(O-benzyl)-CONMe2 CH3—CH2—CH2—CH(O-Me)-CONMe2 CH3—CH2—CH2—CH(O-Et)-CONMe2 CH3—CH2—CH2—CH(O-n-propyl)-CONMe2 CH3—CH2—CH2—CH(O-isopropyl)-CONMe2 CH3—CH2—CH2—CH(O-n-butyl)-CONMe2 CH3—CH2—CH2—CH(O-isobutyl)-CONMe2 CH3—CH2—CH2—CH(O-tertbutyl)-CONMe2 CH3—CH2—CH2—CH(O-n-pentyl)-CONMe2 CH3—CH2—CH2—CH(O-isopentyl)-CONMe2 CH3—CH2—CH2—CH(O-isoamyl)-CONMe2 CH3—CH2—CH2—CH(O-n-hexyl)-CONMe2 CH3—CH2—CH2—CH(O-cyclohexyl)-CONMe2 CH3—CH2—CH2—CH(O-n-octyl)-CONMe2 CH3—CH2—CH2—CH(O-isooctyl)-CONMe2 CH3—CH2—CH2—CH(O-2-ethylhexyl)-CONMe2 CH3—CH2—CH2—CH(O-decyl)-CONMe2 CH3—CH2—CH2—CH(O-dodecyl)-CONMe2 CH3—CH2—CH2—CH(O-phenyl)-CONMe2 CH3—CH2—CH2—CH(O-benzyl)-CONMe2 CH3—CH2—CH2—CMe(O-Me)-CONMe2 CH3—CH2—CH2—CMe(O-Et)-CONMe2 CH3—CH2—CH2—CMe(O-n-propyl)-CONMe2 CH3—CH2—CH2—CMe(O-isopropyl)-CONMe2 CH3—CH2—CH2—CMe(O-n-butyl)-CONMe2 CH3—CH2—CH2—CMe(O-isobutyl)-CONMe2 CH3—CH2—CH2—CMe(O-tertbutyl)-CONMe2 CH3—CH2—CH2—CMe(O-n-pentyl)-CONMe2 CH3—CH2—CH2—CMe(O-isopentyl)-CONMe2 CH3—CH2—CH2—CMe(O-isoamyl)-CONMe2 CH3—CH2—CH2—CMe(O-n-hexyl)-CONMe2 CH3—CH2—CH2—CMe(O-cyclohexyl)-CONMe2 CH3—CH2—CH2—CMe(O-n-octyl)-CONMe2 CH3—CH2—CH2—CMe(O-isooctyl)-CONMe2 CH3—CH2—CH2—CMe(O-2-ethylhexyl)-CONMe2 CH3—CH2—CH2—CMe(O-decyl)-CONMe2 CH3—CH2—CH2—CMe(O-dodecyl)-CONMe2 CH3—CH2—CH2—CMe(O-phenyl)-CONMe2 CH3—CH2—CH2—CMe(O-benzyl)-CONMe2 CH3—CH2—CH2—CEt(O-Me)-CONMe2 CH3—CH2—CH2—CEt(O-Et)-CONMe2 CH3—CH2—CH2—CEt(O-n-propyl)-CONMe2 CH3—CH2—CH2—CEt(O-isopropyl)-CONMe2 CH3—CH2—CH2—CEt(O-n-butyl)-CONMe2 CH3—CH2—CH2—CEt(O-isobutyl)-CONMe2 CH3—CH2—CH2—CEt(O-tertbutyl)-CONMe2 CH3—CH2—CH2—CEt(O-n-pentyl)-CONMe2 CH3—CH2—CH2—CEt(O-isopentyl)-CONMe2 CH3—CH2—CH2—CEt(O-isoamyl)-CONMe2 CH3—CH2—CH2—CEt(O-n-hexyl)-CONMe2 CH3—CH2—CH2—CEt(O-cyclohexyl)-CONMe2 CH3—CH2—CH2—CEt(O-n-octyl)-CONMe2 CH3—CH2—CH2—CEt(O-isooctyl)-CONMe2 CH3—CH2—CH2—CEt(O-2-ethylhexyl)-CONMe2 CH3—CH2—CH2—CEt(O-decyl)-CONMe2 CH3—CH2—CH2—CEt(O-dodecyl)-CONMe2 CH3—CH2—CH2—CEt(O-phenyl)-CONMe2 CH3—CH2—CH2—CEt(O-benzyl)-CONMe2 (CH3—CH2—CH2)2C(O-Me)-CONMe2 (CH3—CH2—CH2)2C(O-Et)-CONMe2 (CH3—CH2—CH2)2C(O-n-propyl)-CONMe2 (CH3—CH2—CH2)2C(O-isopropyl)-CONMe2 (CH3—CH2—CH2)2C(O-n-butyl)-CONMe2 (CH3—CH2—CH2)2C(O-isobutyl)-CONMe2 (CH3—CH2—CH2)2C(O-tertbutyl)-CONMe2 (CH3—CH2—CH2)2C(O-n-pentyl)-CONMe2 (CH3—CH2—CH2)2C(O-isopentyl)-CONMe2 (CH3—CH2—CH2)2C(O-isoamyl)-CONMe2 (CH3—CH2—CH2)2C(O-n-hexyl)-CONMe2 (CH3—CH2—CH2)2C(O-cyclohexyl)-CONMe2 (CH3—CH2—CH2)2C(O-n-octyl)-CONMe2 (CH3—CH2—CH2)2C(O-isooctyl)-CONMe2 (CH3—CH2—CH2)2C(O-2-ethylhexyl)-CONMe2 (CH3—CH2—CH2)2C(O-decyl)-CONMe2 (CH3—CH2—CH2)2C(O-dodecyl)-CONMe2 (CH3—CH2—CH2)2C(O-phenyl)-CONMe2 (CH3—CH2—CH2)2C(O-benzyl)-CONMe2 CH3—CH(O-Et)-CONEt2 CH3—CH(O-n-propyl)-CONEt2 CH3—CH(O-isopropyl)-CONEt2 CH3—CH(O-isobutyl)-CONEt2 CH3—CH(O-tertbutyl)-CONEt2 CH3—CH(O-n-pentyl)-CONEt2 CH3—CH(O-isopentyl)-CONEt2 CH3—CH(O-isoamyl)-CONEt2 CH3—CH(O-n-hexyl)-CONEt2 CH3—CH(O-cyclohexyl)-CONEt2 CH3—CH(O-n-octyl)-CONEt2 CH3—CH(O-isooctyl)-CONEt2 CH3—CH(O-2-ethylhexyl)-CONEt2 CH3—CH(O-decyl)-CONEt2 CH3—CH(O-dodecyl)-CONEt2 CH3—CH(O-phenyl)-CONEt2 CH3—CH(O-benzyl)-CONEt2 CH2(O-Et)-CONEt2 CH2(O-n-propyl)-CONEt2 CH2(O-isopropyl)-CONEt2 CH2(O-isobutyl)-CONEt2 CH2(O-tertbutyl)-CONEt2 CH2(O-n-pentyl)-CONEt2 CH2(O-isopentyl)-CONEt2 CH2(O-isoamyl)-CONEt2 CH2(O-n-hexyl)-CONEt2 CH2(O-cyclohexyl)-CONEt2 CH2(O-n-octyl)-CONEt2 CH2(O-isooctyl)-CONEt2 CH2(O-2-ethylhexyl)-CONEt2 CH2(O-decyl)-CONEt2 CH2(O-dodecyl)-CONEt2 CH2(O-phenyl)-CONEt2 CH2(O-benzyl)-CONEt2 (CH3)2C(O-Me)-CONEt2 (CH3)2C(O-Et)-CONEt2 (CH3)2C(O-n-propyl)-CONEt2 (CH3)2C(O-isopropyl)-CONEt2 (CH3)2C(O-n-butyl)-CONEt2 (CH3)2C(O-isobutyl)-CONEt2 (CH3)2C(O-tertbutyl)-CONEt2 (CH3)2C(O-n-pentyl)-CONEt2 (CH3)2C(O-isopentyl)-CONEt2 (CH3)2C(O-isoamyl)-CONEt2 (CH3)2C(O-n-hexyl)-CONEt2 (CH3)2C(O-cyclohexyl)-CONEt2 (CH3)2C(O-n-octyl)-CONEt2 (CH3)2C(O-isooctyl)-CONEt2 (CH3)2C(O-2-ethylhexyl)-CONEt2 (CH3)2C(O-decyl)-CONEt2 (CH3)2C(O-dodecyl)-CONEt2 (CH3)2C(O-phenyl)-CONEt2 (CH3)2C(O-benzyl)-CONEt2 CH3—CH2—CH(O-Me)-CONEt2 CH3—CH2—CH(O-Et)-CONEt2 CH3—CH2—CH(O-n-propyl)-CONEt2 CH3—CH2—CH(O-isopropyl)-CONEt2 CH3—CH2—CH(O-n-butyl)-CONEt2 CH3—CH2—CH(O-isobutyl)-CONEt2 CH3—CH2—CH(O-tertbutyl)-CONEt2 CH3—CH2—CH(O-n-pentyl)-CONEt2 CH3—CH2—CH(O-isopentyl)-CONEt2 CH3—CH2—CH(O-isoamyl)-CONEt2 CH3—CH2—CH(O-n-hexyl)-CONEt2 CH3—CH2—CH(O-cyclohexyl)-CONEt2 CH3—CH2—CH(O-n-octyl)-CONEt2 CH3—CH2—CH(O-isooctyl)-CONEt2 CH3—CH2—CH(O-2-ethylhexyl)-CONEt2 CH3—CH2—CH(O-decyl)-CONEt2 CH3—CH2—CH(O-dodecyl)-CONEt2 CH3—CH2—CH(O-phenyl)-CONEt2 CH3—CH2—CH(O-benzyl)-CONEt2 CH3—CH2—CMe(O-Me)-CONEt2 CH3—CH2—CMe(O-Et)-CONEt2 CH3—CH2—CMe(O-n-propyl)-CONEt2 CH3—CH2—CMe(O-isopropyl)-CONEt2 CH3—CH2—CMe(O-n-butyl)-CONEt2 CH3—CH2—CMe(O-isobutyl)-CONEt2 CH3—CH2—CMe(O-tertbutyl)-CONEt2 CH3—CH2—CMe(O-n-pentyl)-CONEt2 CH3—CH2—CMe(O-isopentyl)-CONEt2 CH3—CH2—CMe(O-isoamyl)-CONEt2 CH3—CH2—CMe(O-n-hexyl)-CONEt2 CH3—CH2—CMe(O-cyclohexyl)-CONEt2 CH3—CH2—CMe(O-n-octyl)-CONEt2 CH3—CH2—CMe(O-isooctyl)-CONEt2 CH3—CH2—CMe(O-2-ethylhexyl)-CONEt2 CH3—CH2—CMe(O-decyl)-CONEt2 CH3—CH2—CMe(O-dodecyl)-CONEt2 CH3—CH2—CMe(O-phenyl)-CONEt2 CH3—CH2—CMe(O-benzyl)-CONEt2 (CH3—CH2)2C(O-Me)-CONEt2 (CH3—CH2)2C(O-Et)-CONEt2 (CH3—CH2)2C(O-n-propyl)-CONEt2 (CH3—CH2)2C(O-isopropyl)-CONEt2 (CH3—CH2)2C(O-n-butyl)-CONEt2 (CH3—CH2)2C(O-isobutyl)-CONEt2 (CH3—CH2)2C(O-tertbutyl)-CONEt2 (CH3—CH2)2C(O-n-pentyl)-CONEt2 (CH3—CH2)2C(O-isopentyl)-CONEt2 (CH3—CH2)2C(O-isoamyl)-CONEt2 (CH3—CH2)2C(O-n-hexyl)-CONEt2 (CH3—CH2)2C(O-cyclohexyl)-CONEt2 (CH3—CH2)2C(O-n-octyl)-CONEt2 (CH3—CH2)2C(O-isooctyl)-CONEt2 (CH3—CH2)2C(O-2-ethylhexyl)-CONEt2 (CH3—CH2)2C(O-decyl)-CONEt2 (CH3—CH2)2C(O-dodecyl)-CONEt2 (CH3—CH2)2C(O-phenyl)-CONEt2 (CH3—CH2)2C(O-benzyl)-CONEt2 CH3—CH2—CH2—CH(O-Me)-CONEt2 CH3—CH2—CH2—CH(O-Et)-CONEt2 CH3—CH2—CH2—CH(O-n-propyl)-CONEt2 CH3—CH2—CH2—CH(O-isopropyl)-CONEt2 CH3—CH2—CH2—CH(O-n-butyl)-CONEt2 CH3—CH2—CH2—CH(O-isobutyl)-CONEt2 CH3—CH2—CH2—CH(O-tertbutyl)-CONEt2 CH3—CH2—CH2—CH(O-n-pentyl)-CONEt2 CH3—CH2—CH2—CH(O-isopentyl)-CONEt2 CH3—CH2—CH2—CH(O-isoamyl)-CONEt2 CH3—CH2—CH2—CH(O-n-hexyl)-CONEt2 CH3—CH2—CH2—CH(O-cyclohexyl)-CONEt2 CH3—CH2—CH2—CH(O-n-octyl)-CONEt2 CH3—CH2—CH2—CH(O-isooctyl)-CONEt2 CH3—CH2—CH2—CH(O-2-ethylhexyl)-CONEt2 CH3—CH2—CH2—CH(O-decyl)-CONEt2 CH3—CH2—CH2—CH(O-dodecyl)-CONEt2 CH3—CH2—CH2—CH(O-phenyl)-CONEt2 CH3—CH2—CH2—CH(O-benzyl)-CONEt2 CH3—CH2—CH2—CMe(O-Me)-CONEt2 CH3—CH2—CH2—CMe(O-Et)-CONEt2 CH3—CH2—CH2—CMe(O-n-propyl)-CONEt2 CH3—CH2—CH2—CMe(O-isopropyl)-CONEt2 CH3—CH2—CH2—CMe(O-n-butyl)-CONEt2 CH3—CH2—CH2—CMe(O-isobutyl)-CONEt2 CH3—CH2—CH2—CMe(O-tertbutyl)-CONEt2 CH3—CH2—CH2—CMe(O-n-pentyl)-CONEt2 CH3—CH2—CH2—CMe(O-isopentyl)-CONEt2 CH3—CH2—CH2—CMe(O-isoamyl)-CONEt2 CH3—CH2—CH2—CMe(O-n-hexyl)-CONEt2 CH3—CH2—CH2—CMe(O-cyclohexyl)-CONEt2 CH3—CH2—CH2—CMe(O-n-octyl)-CONEt2 CH3—CH2—CH2—CMe(O-isooctyl)-CONEt2 CH3—CH2—CH2—CMe(O-2-ethylhexyl)-CONEt2 CH3—CH2—CH2—CMe(O-decyl)-CONEt2 CH3—CH2—CH2—CMe(O-dodecyl)-CONEt2 CH3—CH2—CH2—CMe(O-phenyl)-CONEt2 CH3—CH2—CH2—CMe(O-benzyl)-CONEt2 CH3—CH2—CH2—CEt(O-Me)-CONEt2 CH3—CH2—CH2—CEt(O-Et)-CONEt2 CH3—CH2—CH2—CEt(O-n-propyl)-CONEt2 CH3—CH2—CH2—CEt(O-isopropyl)-CONEt2 CH3—CH2—CH2—CEt(O-n-butyl)-CONEt2 CH3—CH2—CH2—CEt(O-isobutyl)-CONEt2 CH3—CH2—CH2—CEt(O-tertbutyl)-CONEt2 CH3—CH2—CH2—CEt(O-n-pentyl)-CONEt2 CH3—CH2—CH2—CEt(O-isopentyl)-CONEt2 CH3—CH2—CH2—CEt(O-isoamyl)-CONEt2 CH3—CH2—CH2—CEt(O-n-hexyl)-CONEt2 CH3—CH2—CH2—CEt(O-cyclohexyl)-CONEt2 CH3—CH2—CH2—CEt(O-n-octyl)-CONEt2 CH3—CH2—CH2—CEt(O-isooctyl)-CONEt2 CH3—CH2—CH2—CEt(O-2-ethylhexyl)-CONEt2 CH3—CH2—CH2—CEt(O-decyl)-CONEt2 CH3—CH2—CH2—CEt(O-dodecyl)-CONEt2 CH3—CH2—CH2—CEt(O-phenyl)-CONEt2 CH3—CH2—CH2—CEt(O-benzyl)-CONEt2 (CH3—CH2—CH2)2C(O-Me)-CONEt2 (CH3—CH2—CH2)2C(O-Et)-CONEt2 (CH3—CH2—CH2)2C(O-n-propyl)-CONEt2 (CH3—CH2—CH2)2C(O-isopropyl)-CONEt2 (CH3—CH2—CH2)2C(O-n-butyl)-CONEt2 (CH3—CH2—CH2)2C(O-isobutyl)-CONEt2 (CH3—CH2—CH2)2C(O-tertbutyl)-CONEt2 (CH3—CH2—CH2)2C(O-n-pentyl)-CONEt2 (CH3—CH2—CH2)2C(O-isopentyl)-CONEt2 (CH3—CH2—CH2)2C(O-isoamyl)-CONEt2 (CH3—CH2—CH2)2C(O-n-hexyl)-CONEt2 (CH3—CH2—CH2)2C(O-cyclohexyl)-CONEt2 (CH3—CH2—CH2)2C(O-n-octyl)-CONEt2 (CH3—CH2—CH2)2C(O-isooctyl)-CONEt2 (CH3—CH2—CH2)2C(O-2-ethylhexyl)-CONEt2 (CH3—CH2—CH2)2C(O-decyl)-CONEt2 (CH3—CH2—CH2)2C(O-dodecyl)-CONEt2 (CH3—CH2—CH2)2C(O-phenyl)-CONEt2 (CH3—CH2—CH2)2C(O-benzyl)-CONEt2 The novel compounds of the invention may notably be selected from the following compounds: Method for Preparing the Compound The compound of formula (I) may be prepared by any suitable method. The method may further comprise one of the following steps or both of them: step a) an amidation step with which the group —CONR1R2 may be obtained, and/or step b) a nucleophilic substitution or addition step with which the group —OR1 may be obtained. Steps a) and b) may be applied in the order a) and then b) or in the order b) and then a). However performing a) and then b) is preferred. The steps may be applied from a starting product comprising: a group RaRbCZ1—, wherein Z1 is a nucleophilic and/or nucleofugic group a group —CO—Z2 wherein Z2 is a group selected from OR′, Cl, wherein R′ is a hydrogen or an alkyl group, preferably a C1-C4 alkyl group, for example a methyl or ethyl group. Particularly useful starting products are the products of the following formula (I′): RaRbCZ1—CO—Z2 (I′) As an example, mention may be made of glycolic acid, methyl glycolate, ethyl glycolate, lactic acid, methyl lactate, ethyl lactate, methyl chloropropanoate. Such products are available commercially. It is mentioned that glycolic acid or its ester may be obtained from sugar cane, and that lactic acid or its ester may be obtained from milk. These products may alternatively be obtained via a microbiological route. These are particularly suitable renewable materials. Step a) Amidation Step a) is an amidation step. Typically it allows transformation of a group —CO—Z2 into a group —CONR2R3. It is typically applied by means of an amine of formula HNR2R3. This step may notably be applied by transforming the group —COOH into a group —CONR2R3 directly by reaction with an amine of formula HNR2R3 or by forming a group —COCl and then by reacting with an amine of formula HNR2R3, so as to obtain the compound of formula (I). It is notably possible to apply the following sequence: the —COOH group is transformed into a —CONR2R3 group directly by reaction with an amine of formula HNR2R3. It is also possible to perform trans-amidation. This may be applied in a known way. During this reaction, typically 0.8 to 1.2 mole, preferably from 0.9 to 1.1 mole, preferably about 1 mole of amine per mole of ester are preferably applied. Notably, it is possible to apply acid catalysts (notably Lewis acids) or basic catalysts, for example potassium carbonate or alkyl ortho-titanates. This step may be applied in a solution, for example in an aqueous solution, or in a solution in toluene. During this step it is possible to gradually remove the methanol formed in order to promote the reaction. The removal may be accompanied by removal of the solvent, for example by forming an azeotrope. After separation of the methanol, the removed solvent may be reintroduced into the process. Step b) Nucleophilic Substitution or Addition Step b) is a nucleophilic substitution or addition step. Typically, it allows a group RaRbCZ1-group to be transformed into an —OR1. Nucleophilic substitutions and additions are reactions known to one skilled in the art. They may be applied in the presence of an acid or a base, in a known way. A few details are given below. b1) Nucleophilic Substitution Within the scope of nucleophilic substitution, according to a first embodiment, the nucleophilic group is a group Z1=OH, put into the presence of a compound R1—Y comprising a nucleofugic group Y (leaving group). As examples of compounds comprising a nucleofugic group, for example mention may be made of compounds of formula R1O—X—OR1 wherein X is —CO— or —SO2—, the compounds of formula R1—X wherein X is a halogen such as Br, Cl, I, the compounds R1—OH. For example, it is possible to apply the following reaction schemes (wherein Z′2=Z2 or —NR1R2): Within the scope of nucleophilic substitution, according to a second embodiment, the nucleophilic compound is an alcohol HOR1 put into the presence of a precursor compound of the compound of formula (I) and bearing a nucleofugic group Z1 instead of the future —OR1 group. As a nucleofugic group Z1, mention may for example be made of halogen atoms such as Br, Cl, I and of X—OR groups wherein X=CO or SO2 and R is an alkyl or an aromatic group, for example a mesylate or tosylate or carbonate group. This embodiment may for example be applied starting from a compound of formula RaRbCCl—CO—Me, obtained by radical chlorination of a compound of formula RaRbCH—CO—OMe. This embodiment may also be applied starting from a compound of formula RaRbCCl—CONR1R2, obtained by radical chlorination of a compound of formula RaRbCH—CONR1R2. b2) Nucleophilic Addition Within the scope of a nucleophilic addition, the nucleophilic group is a group Z1=OH, put into the presence of a compound having one ethylenic unsaturation (R1 corresponding to said saturated compound). For example it is possible to apply the following reaction scheme (wherein Z′2=Z2 or —NR1R2): Uses—Formulations The compound of the invention may notably be used as a surfactant, solvent, co-solvent and/or crystallization inhibitor, as a plasticizer or as a coalescence agent. By co-solvent is meant that other solvents may be associated with it. The use as a solvent or co-solvent notably comprises uses for dissolving a compound in a formulation, in a reaction medium, the use for totally or partly solubilizing a product to be removed (degreasing, stripping), and/or for facilitating detachment of material films. For the use as a surfactant, alkoxylated and/or propoxylated compounds are preferred, i.e. wherein n is different from 0 in formula (I). The compound of the invention may notably be used, for the functions indicated above or for other functions, in a phytosanitary formulation, in a cleaning formulation, in a stripping formulation, in a degreasing formulation, in a formulation of lubricants for textiles, in a coating formulation, for example in a paint formulation, in a formulation of pigments or ink, in a plastic formulation. The compound may for example be use as a coalescence agent in an aqueous paint formulation. The compound may notably be used as a solvent for resins for example in the cable cladding industry or in the electronics industry, notably as a solvent of PVDF. The compound may notably be used as a cleaning and/or stripping solvent in the electronics industry. It may notably be used in lithium batteries. It may notably be used on photoresist resins, polymers, waxes, fats, or oils. The compound may notably be used for cleaning inks, for example upon producing inks or during the use of ink for printing. The compound may notably be used for cleaning sieves or other tools applied in methods for making and/or recycling paper. The compound may notably be used for cleaning bitumens or bituminous sands (“tar sands”) for example on coated substrates, on the tools used for applying these materials, on soiled clothing, on dirty vehicles. The compound may notably be used for cleaning flying machines such as aircraft, helicopters, space shuttles. The compound may notably be used as a degreasing agent on metal surfaces, for example surfaces of tools, of manufactured objects, of metal sheets, of molds, notably in steel or in aluminium or in alloys of these metals. The compound may notably be used as a cleaning solvent on hard surfaces or on textile surfaces. The compound may notably be used as a solvent for stripping paint or resins, on tool surfaces, for example casting molds, on surfaces of industrial sites, (floors, partitions, etc.). The formulations for stripping paints may notably be formulations with an aqueous base (the compound being mixed with water) or with a solvent base (the compound then being the solvent or a compound mixed with water). The compound may notably be used as a plasticizer in formulations of thermoplastic polymers. The cleaning and/or degreasing formulations may notably be formulations for housekeeping performed in households or in public domains (hotels, offices, factories . . .). This may be a formulation for cleaning hard surfaces such as floors, furniture surfaces and those fitting out kitchens and bathrooms, dishes. These formulations may also be used in the industrial sphere for degreasing manufactured products and/or cleaning them. Such formulations may notably be used for cleaning and/or cleansing products, tools, molds, clothing or other articles. The compound of the invention may notably be used in phytosanitary formulations comprising a solid active product. More details are given below, where the term of “solvent” may designate the compound of the invention or a material composition comprising it, described above. Detailed use within the Scope of Phytosanitary Formulations The phytosanitary formulation is generally a concentrated phytosanitary formulation comprising an active compound. Agriculture uses many active materials such as fertilizers or pesticides, for example insecticides, herbicides or fungicides. They are referred to as active phytosanitary products (or active materials). Active phytosanitary products are generally produced in pure or highly concentrated form. They have to be used on farms with low concentrations, for this purpose they are generally formulated with other ingredients in order to allow easy weight dilution by the farmer. These are referred to as phytosanitary formulations. The dilution performed by the farmer is generally achieved by mixing the phytosanitary formulation with water. Thus, phytosanitary formulations should allow easy weight dilution by the farmer, in order to obtain a product in which the phytosanitary product is correctly dispersed, for example as a solution, an emulsion, suspension or suspo-emulsion. With phytosanitary formulations, it is thereby possible to transport a phytosanitary product in a relatively concentrated form, with easy conditioning and/or easy handling by the final user. Different types of phytosanitary formulations may be used according to the different phytosanitary products. For example mention may be made of emulsifiable concentrates (EC), concentrated emulsions (Emulsion in Water “EW”), micro-emulsions (ME), wettable powders (WP), water-dispersible granules (WDG). The formulations which may be used depend on the physical form of the phytosanitary product (for example a solid or a liquid) and on its physico-chemical properties in the presence of other compounds such as water or solvents. After weight dilution by the farmer, for example by mixing with water, the phytosanitary product may exist in different physical forms; solution, dispersion of solid particles, dispersion of droplets of the product, droplets of solvent in which the product is dissolved. The phytosanitary formulations generally comprise compounds with which these physical forms may be obtained. These may for example be surfactants, solvents, mineral supports and/or dispersants. Very often, these compounds do not have an active nature, but an intermediate nature for assisting with the formulation. The phytosanitary formulations may notably be in liquid form or in solid form. In order to prepare phytosanitary formulations of solid active phytosanitary products, it is known how to solubilize the product in a solvent. The phytosanitary formulation thus comprises a solution of the product in the solvent. The formulation may be in solid form, for example as a wettable powder (WP) where the solution impregnates an inorganic support, for example kaolin and/or silica. The formulation may alternatively be in liquid form, for example in the form of an emulsifiable concentrate (EC) having a single limpid liquid phase comprising the solvent and the product in the solution, which may form an emulsion by adding water, without stirring or with low stirring. It may also be in the form of a cloudy concentrated emulsion (EW), the phase of which dispersed in the water comprises the solvent and the product in solution in the solvent. It may also be in the form of a limpid micro-emulsion (ME), the phase of which dispersed in water comprises the solvent and the product in solution in the solvent. Certain solid phytosanitary actives are often difficult to formulate. For example, tebuconazole is a particularly efficient fungicide and of widespread use, notably for cultivation of soya. For certain phytosanitary actives, it is difficult to make concentrated formulations, easy to dilute for the farmer, stable and without substantial (proven or perceived) drawbacks as regards safety, toxicity and/or ecotoxicity. For certain actives, it is difficult to formulate them at relatively high concentrations, with sufficient stability. In particular, it is necessary to avoid the occurrence of crystals in particular at low temperature and/or during dilution and/or during storage at a high temperature of the diluted composition. The crystals may have negative effects, notably clogging the filters of the devices used for distributing the diluted composition, clogging the spray devices, reducing the overall activity of the formulation, generating unnecessary problems of waste management for removing the crystals, and/or causing poor distribution of the active product on the farm field. The formulations comprising the solvent notably have: solubilization of significant amounts of actives, absence of crystallization, even in demanding conditions, good biological activity which may be due to good solvation, and/or a safety, toxicology,
{'bibliographic_information': "{'country': 'US', 'doc-number': '13502874', 'kind': 'B2', 'date': '20101018', 'extension': '182', 'invention_title': 'Ether-amide compounds and uses thereof'}", 'source_file': './grant/2015/ipg150317.xml', 'source_data': 'USPTO-Grant'}