A toxic chemical compound found in lily of the valley plants, similar in structure to cardiac glycosides used in heart medicine.
From 'Convallaria' (the genus name for lily of the valley) plus the chemical suffix '-in' or '-arine,' following nomenclature conventions for plant-derived compounds.
Convallamarin is a perfect example of how poison and medicine are often the same molecule—in tiny amounts it helps hearts beat more forcefully, but in larger doses it causes fatal arrhythmias, which is why old herbalists were so careful.
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