Studies on the constituents of Clematis species. III. On the saponins of the root of Clematis chinensis Osbeck.
作者:HARUHISA KIZU、TSUYOSHI TOMIMORI
DOI:10.1248/cpb.28.3555
日期:——
Four triterpenoid prosapogenins named CP2b, CP3b, CP9 and CP10 were isolated from the alkaline hydrolysate of the crude saponin obtained from the root of Clematis chinensis OSBECK. On the basis of chemical and physicochemical evidence, they were characterized as follows : CP2b (I), oleanolic acid 3-O-β-D-xylopyranosyl-(1→2)-α-L-arabinopyranoside ; CP3b (IV), hederagenin 3-O-α-L-rhamnopyranosyl-(1→2)-α-L-arabinopyranoside ; CP9 (V), oleanolic acid 3-O-β-D-glucopyranosyl-(1→4)-β-D-glucopyranosyl-(1→4)-β-D-ribopyranosyl-(1→3)-α-L-rhamnopyranosyl-(1→2)-α-L-arabinopyranoside ; CP10 (X), hederagenin 3-O-β-D-glucopyranosyl-(1→4)-β-D-glucopyranosyl-(1→4)-β-D-ribopyranosyl-(1→3)-α-L-rhamnopyranosyl-(1→2)-α-L-arabinopyranoside.
从金线莲根部的粗皂苷的碱水解产物中分离得到四个三萜原皂苷元,命名为CP2b、CP3b、CP9和CP10。根据化学和物理化学证据,它们被鉴定为:CP2b(I),齐墩果酸3-O-β-D-吡喃木糖基-(1→2)-α-L-吡喃阿拉伯糖苷;CP3b(IV),常春藤苷元3-O-α-L-吡喃鼠李糖基-(1→2)-α-L-吡喃阿拉伯糖苷;CP9(V),齐墩果酸3-O-β-D-吡喃葡萄糖基-(1→4)-β-D-吡喃葡萄糖基-(1→4)-β-D-吡喃核糖基-(1→3)-α-L-吡喃鼠李糖基-(1→2)-α-L-吡喃阿拉伯糖苷;CP10(X),常春藤苷元3-O-β-D-吡喃葡萄糖基-(1→4)-β-D-吡喃葡萄糖基-(1→4)-β-D-吡喃核糖基-(1→3)-α-L-吡喃鼠李糖基-(1→2)-α-L-吡喃阿拉伯糖苷。