Studies on the Constituents of Clematis Species. I. On the Saponins of the Root of Clematis chinensis OSBECK. (1)

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Four triterpenoid saponins, which were tentatively named prosapogenins CP_2,CP_6,CP_7 and CP_8,were isolated from the alkaline hydrolysate of crude saponin obtained from Clematis chinensis OSBECK. On the basis of chemical and physicochemical evidence, they were characterized as follows : CP_2 (I), oleanolic acid 3-O-α-L-rhamnopyranosyl-(1→2)-α-L-arabinopyranoside ; CP_6 (III), hederagenin 3-O-β-D-ribopyranosyl-(1→3)-α-L-rhamnopyranosyl-(1→2)-α-L-arabinopyranoside ; CP_7 (VII), oleanolic acid 3-O-β-D-glucopyranosyl-(1→4)-β-D-ribopyranosyl-(1→3)-α-L-rhamnopyranosyl-(1→2)-α-L-arabinopyranoside ; CP_8 (IX), hederagenin 3-O-β-D-glucopyranosyl-(1→4)-β-D-ribopyranosyl-(1→3)-α-L-rhamnopyranosyl-(1→2)-α-L-arabinopyranoside.
公益社団法人日本薬学会の論文
1979-10-25