A bitter - tasting yellow alkaloid,C20H19NO5,obtained from several plants such as goldenseal and having medical uses as an antipyretic and antibacterial agent.

• 黄连素，小檗碱一种带苦味的黄色生物碱，C20H19NO5，从如白毛茛的几种植物中提取，作为解热剂和杀菌剂而入药