text: Acetone, butanol, and ethanol are the most common products of solventogenesis.  Some species such as Clostridium beijerinckii, Clostridium puniceum and Clostridium roseum are able to further reduce acetone to isopropanol.  Several species are able to produce additional solvents under various culture conditions.  For example, glycerol fermentation results in the production of 1,3-propanediol in several species. Acetoin is produced by several species and is further reduced to 2,3-butanediol by Clostridium beijerinckii.