The Structure of Polygodial: A New Sesquiterpene Dialdehyde from Polygonum hydropiper L

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Abstract
A pungent substance, polygodial, isolated from Polygonum hydropiper L. is shown to be drim-7-en-11,12-dial (I), a new dialdehyde structurally related to sesquiterpene lactones from Drimys species.