protoveratrine

noun

pro·​to·​ver·​a·​trine ˌprōt-ō-ˈver-ə-ˌtrēn  -trən 

1

: either of two toxic crystalline alkaloids obtained from hellebores of the genus Veratrum (especially V. viride of North America and V. album of Europe) and used in the treatment of hypertension

called also respectively protoveratrine A, protoveratrine B

2

: a mixture of protoveratrine A and B used to treat hypertension