Convallamarin /(kŏn*văl`lȧ*mā"rĭn)/

Con·val·la·ma·rin

Convallamarin

n.
  1. A white, crystalline, poisonous substance, regarded as a glucoside, extracted from the lily of the valley (Convallaria Majalis). Its taste is first bitter, then sweet. (Chem.)