中文摘要：

目的：对大叶山楝（Aphanamixis grandifolia）的枝叶部分进行化学成分研究。方法：对大叶山楝枝叶的95%乙醇提取物分别经石油醚和乙酸乙酯萃取。乙酸乙酯部分反复利用正相硅胶、反相RP-18、凝胶Sephadex LH-20等色谱方法进行分离纯化,并运用MS和NMR来鉴定化合物的结构。结果：从大叶山楝中分离鉴定了6个化合物,分别为：aromadendrane-4β,10β-diol（I）,spathulenol（Ⅱ）,eudesm-4（15）-ene-1β,6α-diol（Ⅲ）,3α-cimnamoyloxykaur-16-en-19-oic acid（Ⅳ）,phillygenin（V）,3-methoxybenzoic-4-hydroxy acid（Ⅵ）。结论：6个化合物均为从该属植物中首次分离得到。

英文摘要：

Objective：To research the chemical constitutes isolated from the leaves and twigs of Aphanamixis grandifolia.Methods：The leaves and twigs of A.grandifolia were extracted with 95% ethanol,which was suspended in water and then extracted successively with petroleum ether and ethyl acetate.The ethyl acetate part was extensively separated over a series of chromatographic methods,including silica gel,RP-18,and Sephadex LH-20.These compounds were elucidated by extensive spectroscopic analysis（MS,NMR,and so on）.Results： Six compounds,[aromadendrane-4β,10β-diol（I）,spathulenol（Ⅱ）,eudesm-4（15）-ene-1β,6α-diol（Ⅲ）,3α-cimnamoyloxykaur-16-en-19-oicacid（Ⅳ）,phillygenin（V）,3-methoxybenzoic-4-hydroxy acid（Ⅵ）.] were isolated and identified.Conclusion：Six compounds were all isolated from genus Aphanamixis for the first time.