目的：研究四合木Tetraena mongolica的化学成分。方法：采用硅胶柱色谱、凝胶柱色谱和HPLC制备色谱方法分离纯化得到单体化合物，采用有机波谱方法鉴定化合物结构。结果：从四合木醋酸乙酯提取物中分离得到5个化合物，分别为11α，12α:13β，28-diepoxyoleanane-3β-caffeate（1），3β-hydroxy-11α，12α:13β，28-diepoxyoleanane（2），3β-（3，4-dihydroxy-cinnamoyl）- erythrodiol（3），槲皮素（4），（E）-22-（3-（4-hydroxy-3-methoxyphenyl）acryloyloxy）docosanoic acid（5）。结论：化合物1～5均为首次从该属中分离得到，化合物1为未见报道的新化合物，化合物2为新天然产物。

Objective: To study the chemical constituents from Tetraena mongolica. Methods: Chemical constituents were isolated and purified by repeated column chromatography (silica gel, Toyopearl HW-40C, and preparative HPLC). Their structures were determined by ¹H-NMR, ¹³C-NMR, and 2D-NMR spectra methods. Results: Five compounds were isolated from the EtOAc extract of Tetraena mongolica and their structures were identified as follows: 11α, 12α: 13β, 28- diepoxyoleanane-3β-caffeate (1), 3β-hydroxy-11α, 12α: 13β, 28- diepoxyoleanane (2), 3β-(3, 4-dihydroxycinnamoyl)-erythrodiol (3), quercetin (4), (E)-22-[3- (4-hydroxy- 3-methoxyphenyl)acryloyloxy]docosanoic acid (5). Conclusion: Compounds 1-5 are isolated from this plant for the first time, compound 1 is a new product, and compound 2 is a new natural product.