小叶买麻藤茎化学成分及其黄嘌呤氧化酶抑制活性研究

Chemical constituents from the stems of Gnetum parvifolium and their xanthine oxidase inhibitory activities

目的研究小叶买麻藤Gnetum parvifolium(Warb.)C.Y.Cheng ex Chun茎的化学成分及其黄嘌呤氧化酶抑制活性。方法小叶买麻藤茎95%乙醇提取物采用硅胶、MCI、制备HPLC进行分离纯化,根据理化性质及波谱数据鉴定所得化合物的结构。采用紫外分光光度法测定黄嘌呤氧化酶的抑制活性。结果从中分离得到17个化合物,分别鉴定为异单叶大黄素(1)、白藜芦醇(2)、对羟基苯甲醛(3)、环桉树醇(4)、(E)-1-(3′,5′-dimethoxyphenyl)-2-(3,4-dimethoxyphenyl)ethene(5)、豆甾-4-烯-3-酮(6)、medioresinol(7)、白杨素(8)、金色酰胺醇酯(9)、(-)-松脂醇(10)、对羟基苯甲酸酯(11)、2-甲氧基对苯二酚(12)、gnetumontain C(13)、丁香脂素(14)、高圣草素(15)、香草醛(16)、β-谷甾醇(17)。化合物1~3、15~16的IC_(50)值分别为(11.4±0.54)、(14.1±1.06)、(320.4±0.75)、(360.6±0.78)、(386.3±0.71)μmol/L。结论化合物3~4为首次从该植物中分离得到,化合物5~13为首次从买麻藤属植物中分离得到。化合物1~3、15~16具有黄嘌呤氧化酶抑制活性。

AIM To study the chemical constituents from the stems of Gnetum parvifolium(Warb.)C.Y.Cheng ex Chun and their xanthine oxidase inhibitory activities.METHODS The 95%ethanol extract from the stems of G.parvifolium was isolated and purified by silica gel,MCI and preparative HPLC,then the structures of obtained compounds were identified by physicochemical properties and spectral data.The inhibitory activities on xanthine oxidase was determined by ultraviolet spectrophotometry.RESULTS Seventeen compounds were isolated and identified as isorhapontigenin(1),resveratrol(2),4-hydroxybenzaldehyde(3),cycloeucalenol(4),(E)-1-(3′,5′-dimethoxyphenyl)-2-(3,4-dimethoxyphenyl)ethene(5),stigmast-4-en-3-one(6),medioresinol(7),chrysin(8),aurantiamide acetate(9),(-)-pinoresinol(10),methyl 4-hydroxybenzoate(11),2-methoxybenzene-1,4-diol(12),gnetumontain C(13),syringaresinol(14),homoeriodictyol(15),vanillin(16),β-sitosterol(17).The IC_(50)values of compounds 1-3,15-16 were(11.4±0.54),(14.1±1.06),(320.4±0.75),(360.6±0.78),(386.3±0.71)μmol/L,respectively.CONCLUSION Compounds 3-4 are isolated from this plant for the first time.Compounds 5-13 are first isolated from genus Gnetum.Compounds 1-3,15-16 have xanthine oxidase inhibitory activities.