Bioactive Saponins and Glycosides. XVIII. Nortriterpene and Triterpene Oligoglycosides from the Fresh Leaves of Euptelea polyandra SIEB. et ZUCC. (2): Structures of Eupteleasaponins VI, VI Acetate, VII, VIII, IX, X, XI, and XII

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Following the elucidation of eupteleasaponins I, II, III, IV, V, and V acetate, eupteleasaponins VI, VI acetate, VII, VIII, IX, X, XI, and XII were isolated from the fresh leaves of Euptelea polyandra SIEB. et ZUCC. The structures of eupteleasaponins VI-XII were determined on the basis of chemical and physicochemical evidence.