单词	pyridine
释义	pyridine /ˈpɪrɪdiːn / noun [mass noun] Chemistry A colourless volatile liquid with an unpleasant odour, present in coal tar and used chiefly as a solvent. A heteroaromatic compound; chemical formula: C5H5N. The folic acid pathway provides the essential precursor molecule, pyridine thymidylate, needed in DNA biosynthesis.... The structure of niacinamide consists of a pyridine ring with an amide group in position three. This is a pyridine silver method described by Ranson in 1911 for impregnating unmyelinated nerve fibers. Origin Mid 19th century: from Greek pur 'fire' + -ide + -ine4.
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