Studies on the Constituents of Viburnum Species. XVII. New Dammarane-Type Triterpenoids from Viburnum dilatatum THUNB.

Abstract

Five new dammerane-type triterpenoids, viburnols A, B, C, D and E, were isolated from the leaves of Viburnum dilatatum THUNB. (Caprifoliaceae). The structures were determined by extensive spectroscopic studies. Viburnols A, B and C are the first examples of a new class of modified dammarane triterpene.