目的:研究桃金娘科蒲桃属植物洋蒲桃枝叶的化学成分。方法:采用硅胶柱层析、葡聚糖凝胶、制备型HPLC等多种色谱技术分离纯化,通过理化性质和波谱数据鉴定化合物结构。结果:从洋蒲桃枝叶95%乙醇提取物的氯仿部分中分离得到14个化合物,分别鉴定为:熊果醛(1)、白桦脂醇(2)、白桦脂醛(3)、白桦脂酸(4)、羽扇豆醇(5)、β-谷甾醇(6)、5,7-二羟基-6-甲基二氢黄酮(7)、2',4'-二羟基-6'-甲氧基-3'-甲基二氢査耳酮(8)、2',4'-二羟基-6'-甲氧基-3'-甲基査耳酮(9)、5,7-二羟基-6,8-二甲基二氢黄酮(10)、5,7-二羟基二氢黄酮(11)、2',4'-二羟基-6'-甲氧基-3',5'-二甲基二氢查耳酮(12)、2'-羟基-4',6'-二甲氧基-3'-甲基査耳酮(13)、对羟基苯甲醛(14)。结论:其中,化合物1~4、14为首次从该植物中分离得到。
Objective: To investigate the chemical constituents from the branches and leaves of Syzygium samarangense. Methods:The dried branches and leaves of Syzygium samarangense were powdered and extracted with 95% ethanol,then partitioned with petroleum ether,chloroform and ethyl acetate. The chloroform fraction was subjected to silica gel,Sephdex L-20 and preparative HPLC. The structures were identified by physicochemical properties and spectral data. Results: 14 compounds were respectively isolated and identified as ursolic aldehyde( 1),betulin( 2),betulinic aldehyde( 3),betulinic acid( 4),lupeol( 5),β-sitosterol( 6),5,7-dihydroxy-6-methylflavanone( 7),2',4'-dihydroxy-6'-methoxy-3'-methyldihydrochalcone( 8),2',4'-dihydroxy-6'-methoxy-3'-methylchalcone( 9),5,7-dihydroxy-6,8-dimethylflavanone( 10),5,7-dihydroxyflavanone( 11),2',4'-dihydroxy-6'-methoxy-3',5'-dimethyldihydrochalcone( 12),2'-hydroxy-4',6'-dimethoxy-3'-methylchalcone( 13) and p-hydroxybenzaldehyde( 14). Conclusion: Compounds 1 ~ 4 and 14 are isolated from this plant for the first time.