| Abstract: | The phytochemical investigation of the dried fruits of Swartzia madagascariensis (Leguminosae) afforded the five triterpenoid saponins 1–5 . They were shown to be glucuronides of oleanolic acid and of gypsogenin by chemical and spectral means ( FAB-MS , 13 C-NMR , GC / MS ). One of the isolated compounds, identified as 3-O-O-α-L-rhamnopyranosyl-(1→3)-(β-D-glucopyranosyluronic acid)]oleanolic acid, was responsible for the high molluscicidal activity of Swartzia madagascariensis fruits against the schistosomiasis-transmitting snails Biomphalaria glabrata and Bulinus globosus. |
