【摘要】 从中药祁州漏芦中分离得到一个新的三萜类化合物,根据波谱分析,理化常数测定确定其结构为2a,3a,19a,25-四羟基乌苏-12-烯-23,28-二酸,同时还分到乌苏酸,3-氧-19a-羟基乌苏-12-烯-28-酸,坡模提酸,2a,3a,19a-三羟基乌苏-12-烯-28-酸,牛蒡子酸,儿茶精和b-谷甾醇。更多还原

【Abstract】 From the roots of Rhaponticum uniflorum a new triterpene was isolated together with ursolic acid(2), 3-oxo-19a-hydroxyurs-12-en-28-oic acid (3), pomolic acid (4), 2a,3a,19a-trihydroxyurs-12-en-28-oic acid (5), arctic acid (6), catechin (7) and b-sitosterol (8). The structure of the new compound was elucidated as 2a,3a,19a,25-tetrahydroxyurs-12-en-23,28-dioic acid (1) on the basis of spectral and chemical methods.更多还原