A new triterpenoid saponin from the stem bark of Pometia pinnata

Abstract

Phytochemical investigation of the stem bark of Pometia pinnata resulted in the isolation of a new triterpenoidal saponin. The structure of the new compound, pometin (1), was established as 3-O-[β-D-glucopyranosyl- (1→2)-β-D-glucopyranosyl-(1→3)-β-D-glucopyranosyl] -oleanolic acid based on 1D and 2D-NMR analysis including COSY, 2D J-resolved, HMQC, HMBC correlations and chemical transformations.