Guaianolide Glucosides fromHelenium donianum

Abstract
The aerial parts of Helenium donianum afforded in addition to tenulin linifolin A, helenalin, its angelate, microhelenin C and 11α, 13-dihydrohelenalin senecioate, two isomeric guaianolide glucosides as well as the glucoside of lavandulol. The structures were elucidated by high field 1H-NMR spectroscopy.

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