Answer: ouabain

AnswerCrossword Clue
ouabainglycoside occurring as a white, crystalline powder, C29H44O12, obtained from the seeds of a shrub, Strophanthus gratus, or from the wood of trees of the genus Acokanthera, and
ouabaina poisonous glycoside C29H44O12 obtained from several African shrubs or trees (genera Strophanthus and Acokanthera) of the dogbane family and used medically like digitalis and in Africa as an arrow poison
ouabaina cardiac stimulant