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[摘要]
从约藤Uncaria rhynchophylla枝叶的乙醇提取物中分得5个非生物碱化合物。经光谱鉴定,Ⅸ为新化合物:3β,19α-dihydroxyurs-5,12-dien-28-oicacid,命名为钩藤苷元D;Ⅹ和Ⅺ为首次从该植物中得到的化合物:3β,6β,19α-trihydroxy-23-oxo-urs-12-en-oicacid(Ⅹ),3β-hydroxyurs12-en-27,28-dioicacid(Ⅺ);Ⅻ和分别为β-谷甾醇和6-甲氧基-7-羟基香豆素(scopoletin)。
[Key word]
[Abstract]
A new triterpenoid named uncargenin D with a structure of 3β, 19α-dihydroxy-urs-5, 12-di en-28-oic acid(Ⅸ), and four known compounds were isolated from the ethanolic extract of twig and leaf of Uncaria rhynchophylla Miq. Jacks. The four known compounds were:3β, 6β, 19α-trihydroxy-23-oxo-urs-12 en-oic acid (Ⅹ), 3β-hydroxy-urs-12 en-27, 28-dioic acid (Ⅺ), which were isolated for the first time from Un caria, β-sitosterol (Ⅻ)and scopoletin (ⅩⅢ).
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