Triterpene Saponins from Abrus cantoniensis(Leguminosae). I. Isolation and Characterization of Four New Saponins and a New Sapogenol.

From Abri Herba, the whole plant of Abrus cantoniensis (Leguminosae), ten new oleanene saponins together with thirteen known onew were isolated. Among them, four saponins called abrisaponins L, A, D1 and Ca have been elucidated to be 3-O-α-L-rhamnopyranosyl-(1→2)-β-D-galactopyranosyl-(1→2)-β-D-glucuronopyranosyl (designated as β-fabatriosyl) abrisapogenol L (1), 3-O-β-fabatriosyl abrisapogenol A (2), 3-O-β-fabatriosyl abrisapogenol D (3), and 3-O-β-fabatriosyl cantoniensistriol (4), respectively.