Abstract:Four triterpenoid saponins along with three triterpenes, oleanolic acid (1), ursolic acid (2) and hederagenin (3) were isolated from the leaves of flex kwangtungensis. By spectroscopic and chemical methods, the structures of the four saponins were identified as 3-O-β-D- glucopyranosyl-(1 →3)-α-L-arabinopyranosylxileanoli acid (4), 3-O-β-D-glucopyranosyl- (1→2)-α-L-arabinopy-ranosylxileanol acid (5), 3-O-β-D-glucopyranosyl- oleanolic acid (6) and 3-O-β-D-glucopyranosyl(1→ 2)-β-D-galactopyranosyl-oleanolic acid (7).This paper is the first report of the chemical constituents from this plant.
