目的研究藏药大果大戟Euphorbia wallichii丙酮提取物中的化学成分。方法用溶剂提取,常规硅胶柱色谱分离和葡聚糖凝胶Sephadex LH-20纯化,采用化学方法和现代波谱分析技术(包括IR,HRESIMS,HRSIMS,1D和2D NMR等)鉴定其化学结构。结果从青海产大果大戟根的丙酮提取物中分离得到6个化合物,分别鉴定为羊毛甾醇(lanosterol,Ⅰ)、巨大戟二萜-20-肉豆蔻酸酯(ingenol-20-myristinate,Ⅱ)、巨大戟二萜-3-肉豆蔻酸酯(ingenol-3-myristinate,Ⅲ)、没食子酸(gallic acid,Ⅳ)、1-O-α-L-阿拉伯糖-(1→6)-β-D-葡萄糖苷-3,7-二甲基-2-烯-7-羟基-辛醇(1-O-α-L-arabinofuranosyl-(1→6)-β-D-glucopyranosyl-3,7-dimethyl-oct-2-en-7-ol,Ⅴ)、1-O-没食子酰葡萄糖苷(1-O-galloyl-β-D-glucose,Ⅵ)。结论巨大戟烷型二萜酯类化合物Ⅱ和Ⅲ为新化合物,其他化合物均为首次从该植物中分离得到,单萜二糖苷类化合物Ⅴ系首次在该属中发现。

Objective To study the chemical constituents from the acetone extract in the root of Tibetan medicine Euphorbia wallichii. Methods The constituents were separated by column chromatography with silica gel and purified by Sephadex LH-20. Their structures were identified on the basis of spectral analysis such as IR, HRESIMS, HRSIMS, and 1D-and 2D-NMR techniques ( 1H- 1H COSY, HMQC, HMBC). Results Six compounds were isolated from the acetone extract in the root of E. wallichii. Their structures were identified as lanosterol (Ⅰ), ingenol-20-myristinate (Ⅱ), ingenol-3-myristinate (Ⅲ), acid (Ⅳ), 1-O-α-L-arabinofuranosyl-(1→6)-β-D-glucopyranosyl-3, 7-dimethyl-oct-2-en-7-ol (Ⅴ), 1-O-galloyl-β-D-glucose (Ⅵ). Conclusion Ingenane diterpene esters ingenol-20-myristinate (Ⅱ) and ingenol-3-myristinate (Ⅲ) are new compounds and other compounds are found from this plant for the first time. It is the first time that monoterpene disaccharide glycoside, compound Ⅴ, is isolated from the plants of Euphorbia L.

中国科学院“西部之光”人才培养计划项目;中国科学院知识创新工程特别支持项目(CXLY-2002-8)