an alkaloid derived from ergot that is less toxic than ergot; causes constriction of blood vessels and is used to treat migraine
ergotamine详细解释
er.got.a.mine n.（名词）A crystalline alkaloid, C33H 35N 5O 5, derived from ergot that induces vasoconstriction and is used especially in treating migraine. 麦角胺：一种结晶生物碱，C33H 35N 5O 5，由麦角中提取，有使血管收缩的作用，特别用来治疗偏头痛
