Saponins from leaves of Aphloia theiformis

Abstract

Three triterpene glucosides have been isolated from the methanol extract of the leaves of Aphloia theiformis. The identities of the compounds were established by spectroscopic ( 1H NMR, 13C NMR, MS) and chemical methods (hydrolysis, acetylation). Two of the compounds were identified as tormentic acid ester glucoside and 23-hydroxytormentic acid ester glucoside, respectively. The structure of the third compound was established as 6β-hydroxytormentic acid ester glucoside, a new naturally occurring saponin.