【摘要】 <正> 红直獐牙菜(Swertia erythrosticta Maxim.)为龙胆科獐牙菜属植物,产于四川、青海、甘肃等地,全草入药可治疗肺炎、黄疸和咽喉肿痛等症。其化学成分尚未见报道。我们从其全草的甲醇提取物分离到6种游离(口山)酮(Ⅰ—Ⅵ)和两种(口山)酮甙(Ⅶ和Ⅷ),更多还原

【Abstract】 Swertia erythrosticta Maxim. (Gentianaceae) is a herb used for curing some diseases in Tibetan traditional medicine system. Eight xanthones were isolated from this species. Their structures were identified as 1,8-dihydroxy-3,7-dimethoxyxantho-ne (Ⅰ), 1,5,8-trihydroxy-3-methoxyxanthone (Ⅱ), 1,3,8-trihydroxy-5-methoxyxanthone (Ⅲ), 1,7,8-trihydroxy-3-methoxyxanthone (Ⅳ), 1,3,5,8-tetrahydroxyxanthone (Ⅴ), 1,3,7,8-tetrahydroxyxanthone(Ⅵ), as well as 8-O-β-D-glucopyranosyl-1, 5-dihydro-xy -3-methoxyxanthone(Ⅶ),8-O-β-D-glucopyranosyl-1,3,5-trihydroxyxanthone(Ⅷ) by means of chemical methodes and spectral analyses.更多还原