Saponins from Leaves of Acanthopanax senticosus HARMS., Ciwujia. II. : Structures of Ciwujianosides A1, A2, A3, A4 and D3

摘要: Further investigation of the chemical constituents leaves Acanthopanax senticosus HARMS. resulted in isolation five new triterpenoid saponins, named ciwujianosides A1 (1), A2 (2), A3 (3), D3(4) and A4 (5). The structures these saponins were elucidated as follows : 1, 3-O-β-glucopyranosyl-(1→2)-α-arabinopyranosyloleanolic acid 28-O-α-rhamnopyranosyl-(1→4)-β-glucopyranosyl-(1→6)-β-glucopyranosyl ester; 2, 3-O-β-glucopyranosyl-(1→2)-α-arabinopyranosyl-30-norolean-12, 20(29)-dien-28-oic 3, 3-O-α-rhamnopyranosyl-(1→2)-α-arabinopyranosylmesembryanthemoidigenic 4, 3-O-α-arabinopyranosylmesembryanthemoidigenic 28-O-α-rhamnopyranosyl-(1→4)-6-O-acetyl-β-glucopyranosyl-(1→6)-β-glucopyranosyl 5, 3-O-β-glucopyranosyl-(1→2)-α-arabinopyranosylmesembryanthemoidigenic 28-O-α-rhamnopyranosyl-(1→4)-6-O-acetyl-β-glucopyranosyl-(1→6)-β-glucopyanosyl ester.