A crystalline, basic, heterocyclic compound whose molecule is the basis of many naturally occurring substances such as caffeine and xanthine; any…
| 单词 | θ69967 |
| 释义 | the world > matter > chemistry > organic chemistry > organic compounds > [noun] > cyclic compounds > bicyclic compounds (3) purine1898 A crystalline, basic, heterocyclic compound whose molecule is the basis of many naturally occurring substances such as caffeine and xanthine; any… halowax1922 (see quots.). spirolactone1958 Any spirane in which one of the rings is a lactone; spec. any of the series of steroid derivatives to which spironolactone belongs. |
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