摘要
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 IC50 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.
Abstract
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 IC50 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.
基金项目
贵州省高层次创新型人才百层次人才项目(黔科合平台人才[2020]6011号)
贵州省中药、民族药活性物质筛选新技术开发应用科技创新人才团队项目(黔科合平台人才[2020]5006号)
贵州省科技计划项目(黔科合基础-ZK[2021]一般554号)
贵州医科大学青苗项目(19NSP077)
贵州医科大学博士启动基金项目(校博合J字2020005号)