大叶钩藤非生物碱部分的化学成分研究

目的 研究中药大叶钩藤(Urncaria macrophylla Wall.)非生物碱部分的化学成分.方法 用硅胶柱层析分离,并用各种波谱(MS、IR、NMR)法对化合物的结构进行鉴定.结果 从大叶钩藤中分离鉴定了6个化合物,其结构分别为β-谷甾醇、β-胡萝卜苷、乌苏酸、α-香树素乙酸酯、3β,6β,23-trihydroxyurs-12-en-28-oic acid、3β-hydroxyurs-12-en-27,28-dioic acid.结论 大叶钩藤非生物碱部分主要含乌苏酸.α-香树素乙酸酯和3β-hydroxyurs-12-en -2728-dioic acid 为首次从该植物中获得.

Chemical constituents of the non-alkaloid fraction of Uncaria macrophylla

OBJECTIVE: To analyze the chemical constituents of the non-alkaloid fraction of Uncaria macrophylla. METHODS: The constituents were separated and purified by silica gel chromatography and recrystalization, and their structures were identified by infrared, mass and nuclear magnetic resonance spectrometry. RESULTS: Six compounds were isolated from the non-alkaloid fraction of Uncaria macrophylla, whose structures were identified as beta-sitosterol, beta-daucosterol, ursolic acid, alpha-amyrin acetate, 3beta, 6beta, 23-trihydroxyurs-12-en-28-oic acid, 3beta-hydroxyurs-12-en-27, and 3beta-hydroxyurs-12-en-27, 28-dioic acid, respectively. CONCLUSIONS: Ursolic acid is the main component in the non-alkaloid fraction of Uncaria macrophylla. Alpha-amyrin acetate and 3beta-hydroxyurs-12-en-27, 28-dioic acid are isolated and characterized for the first time from this plant.