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

可分离的碳环环内含七个七个以的碳。

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

碳环糖是一类呋糖环中的氧原子被亚甲基取代后形成的糖类似。