Isolable carbocyclic compounds contain seven or fewer carbons in the cycle.

可分离的合物内含七个或七个以的。

Carbasugars,carbocyclic analogues of true sugars,are compounds in which the ring-oxygen of furanoid or pyranoid sugars is replaced by methylene group.

是一类呋或中的氧原子被亚甲基取代后形成的类似物。