藏药印度獐芽菜石油醚部位化学成分及体外活性研究

Chemical constituents from petroleum ether fraction of Swertia chirayita and their activities in vitro

采用各种柱色谱以及重结晶等方法对印度獐芽菜石油醚萃取部位进行化学成分研究。通过理化性质和波谱数据分析鉴定了15个化合物,包括8个酮,2个三萜,1个裂环烯醚萜,1个香豆素和3个其他类化合物,分别为1,8-二羟基-3,5-二甲氧基酮(1)、1-羟基-3,7,8-三甲氧基酮(2)、1,8-二羟基-3,5,7-三甲氧基酮(3)、1-羟基-3,5,7,8-四甲氧基酮(4)、1,5,8-三羟基-3-甲氧基酮(5)、1-羟基-3,7-二甲氧基酮(6)、1,8-二羟基-3,7-二甲氧基酮(7)、1-羟基-3,5-二甲氧基酮(8)、古柯二醇(9)、齐墩果酸(10)、(±)-龙胆内酯(11)、东莨菪内酯(12)、芥子醛(13)、丁香醛(14)、β-谷甾醇(15)。其中化合物3,4,9,11~14为首次从该植物中分离得到,化合物9和12为首次从獐芽菜属中发现。对5个量大酮1,2,5,7,8进行体外活性测试,结果显示其在最高浓度50μmol·L^(-1)对胰腺癌细胞SW1990和Bx PC-3的增殖和过氧化氢(H_2O_2)诱导的人脐静脉融合细胞EA.hy926氧化应激损伤均无明显作用。

The present work is to study the chemical constituents from petroleum ether fraction of Tibetan medicine Swertia chirayita by column chromatography and recrystallization. The structures were identified by physical and chemical properties and spectral data as swerchirin（ 1）,decussatin（ 2）,1,8-dihydroxy-3,5,7-trimethoxyxanthone（ 3）,1-hydroxy-3,5,7,8-tetramethoxyxanthone（ 4）,bellidifolin（ 5）,1-hydroxy-3,7-dimethoxyxanthone（ 6）,methylswertianin（ 7）,1-hydroxy-3,5-dimethoxyxanthone（ 8）,erythrodiol（ 9）,oleanolic acid（ 10）,gnetiolactone（ 11）,scopoletin（ 12）,sinapaldehyde（ 13）,syringaldehyde（ 14）,and β-sitosterol（ 15）.Compounds 3,4,9,11-14 were isolated from S. chirayita for the first time. Compounds 9 and 12 were firstly isolated from the genus Swertia. The cytotoxic activities of compounds 1,2,5,7 and 8 against human pancreatic cancer cell lines SW1990 and Bx PC-3,and the protective effects of these compounds against hydrogen peroxide（ H_2O_2）-induced oxidative stress in human endothelium-derived EA. hy926 were investigated in vitro. The results showed no obvious effect at the high concentration of 50 μmol·L^（-1）