alkaloid

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。

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。

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。