conessine

noun
co·​nes·​sine | \kəˈne(ˌ)sēn, -nesə̇n\
plural -s

Definition of conessine 

: a very bitter poisonous crystalline alkaloid C24H40N2 obtained from certain tropical trees of the family Apocynaceae (especially Holarrhena antidysenterica and Wrightia zeylandica)

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History and Etymology for conessine

International Scientific Vocabulary conessi (bark) + -ine

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