目的 研究五加科树参属植物变叶树参Dendropanax proteus根醋酸乙酯部位的化学成分。方法 利用硅胶和Sephadex LH-20等色谱技术进行分离纯化，根据NMR、MS等波谱数据和理化性质鉴定化合物结构。结果 从变叶树参根95%乙醇提取物的醋酸乙酯萃取部位分离鉴定了6个化合物，分别为3,5-二甲氧基-4-羟基反式桂皮醛（1）、3-甲氧基-4-羟基反式桂皮醛（2）、香草酸（3）、香草醛（4）、壬二酸（5）和β-谷甾醇（6）。结论 化合物1～5为首次从该属植物中分离得到。

Objective To study the chemical constituents from the roots of Dendropanax proteus. Methods The chemical constituents were isolated and purified by silica gel and Sephadex LH-20 column chromatography. Their structures were identified on the basis of spectroscopic data, such as NMR, MS, and physicochemical properties. Results Six compounds were isolated from the ethyl acetate fraction in 95% EtOH extract of D. proteus and identified as 3,5-dimethoxy-4-hydroxy-(E)-cinnamaldehyde (1), 3-methoxy-4-hydroxy-(E)-cinnamaldehyde (2), vanillic acid (3), vanillin (4), 1,9-nonanedioic acid (5), and β-sitostero1 (6). Conclusion Compounds 1—5 are isolated from the plants of this genus for the first time.