目的研究木通科植物白木通藤茎的化学成分。方法通过反复硅胶柱色谱、ODS柱色谱和重结晶等方法进行分离纯化,根据化合物的理化性质和波谱数据鉴定结构。结果从白木通藤茎70%乙醇提取物中分离得到6个化合物。分别鉴定为2,α3,β23-trihydroxyolean-12-en-28-oic ac idO-β-D-xylopyranosyl-(1→3)-O-α-L-rhamnopyranosyl-(1→4)-O-β-D-glucopyranosyl-(1→6)-β-D-glucopyranosyl ester(I),2,α3,β23-trihydroxyurs-12-en-28-oic ac idO--βD-xylopyranosyl-(1→3)-O-α-L-rhamnopyranosyl-(1→4)-O-β-D-glucopyranosyl-(1→6)-β-D-glucopyranosyl ester(II),2α,3,β23-trihydroxyolean-12-en-28-oic ac idO-α-L-rhamnopyranosyl-(1→4)-O-β-D-glucopyranosyl-(1→6)-β-D-glucopyranosylester(III),2,α3,β23-trihydroxyurs-12-en-28-oic ac idO-α-L-rhamnopyranosyl-(1→4)-O-β-D-glucopyranosyl-(1→6)-β-D-glucopyranosyl ester(IV),2,α3,β23-trihydroxyolean-12-en-28-oic ac idO--βD-glucopyranosyl ester(V),2,α3,β23-trihydroxyurs-12-en-28-oic ac idO-β-D-glucopyranosyl ester(V I)。结论化合物II为新化合物,命名为mutongsapon inC,其他均为首次从该植物藤茎中分离得到。
