Drei Neue Steroidsaponine aus Vernonia amygdalina (Compositae)

Three News Steroid Saponins from Vernonia amygdalina (Compositae) Three steroid saponins, vernonioside D1, D2 and E (6–8), were isolated from the methanol extract of the leaves of Vernonia amygdalina Del. (Compositae). Their structures have been established mainly by one- and two-dimensional NMR methods (NOE difference spectroscopy, ROESY, HH-COSY, CH-COSY, CH-COLOC).