| 单词 | pyridine base |
| 释义 | > as lemmaspyridine base pyridine base n. any of various basic compounds containing the heteroaromatic C5N ring present in pyridine. ΚΠ 1857 W. A. Miller Elements Chem. III. 259 (heading) Pyradine bases. 1871 Proc. Royal Soc. 20 208 (title) Carbon groups analogous to..those contained in the pyridine bases. 1932 Amer. Jrnl. Cancer 16 1513 The tar of cigarette smoke contains nicotine, phenolic bodies, pyridine bases, and ammonia. 1992 Jrnl. Org. Chem. 57 36/1 The configuration of the carbon bearing the carboxyl group and an added pyridine base play an important role in the stereoselectivity of the reaction. < as lemmas |
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