alkaloid

[化]生物碱英释中释nany of a group of nitrogenous basic compounds found in plants, typically insoluble in water and physiologically active

1 Cocaine is a crystalline tropane alkaloid that is obtained from the leaves of the coca plant..可卡因是一种结晶状的莨菪生物碱，是从古柯叶中提取得来的。

2 The company insists, however, that coca leaves are used as a flavoring agent only after removing the illegal cocaine alkaloid..然而，公司坚持古柯叶是在消除了非法可卡因生物碱之后才被用作调味剂。

3 Scientists are not clear how the fungus controls the ants, but know that it releases alkaloid chemicals into the insect as it consumes it from the inside..科学家还不清楚寄生菌是如何控制木蚁的，只知道寄生菌在木蚁体内吸收营养物质的同时释放出生物碱。