sent1: Pentane is an organic compound with the formula C5H12—that is, an alkane with five carbon atoms. The term may refer to any of three structural isomers, or to a mixture of them: in the IUPAC nomenclature, however, pentane means exclusively the n-pentane isomer, in which case pentanes refers to a mixture of them; the other two are called isopentane (methylbutane) and neopentane (dimethylpropane). Cyclopentane is not an isomer of pentane because it has only 10 hydrogen atoms where pentane has 12.
  Pentanes are components of some fuels and are employed as specialty solvents in the laboratory. Their properties are very similar to those of butanes and hexanes.
sent2: इक्षुशर्करा (सूक्रोज) एक डाइसैकेराइड है। इस प्रांगजलीय का निर्माण ग्लूकोज तथा फलशर्करा के एक-एक अणु से मिलकर हुआ है। इसका स्वाद मीठा होता है तथा इसका अणु सूत्र C12H22O11 है।