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con·val·la·tox·in | \ ˌkän-ˌval-ə-ˈtäk-sən, -vəl- 
\
\Medical Definition of convallatoxin
: a glycoside C29H42O10 obtained especially from the dried rhizome, roots, and flowers of the lily of the valley that acts on the heart and that on hydrolysis yields strophanthidin and rhamnose
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