目的 研究五加科樹參屬植物變葉樹參Dendropanax proteus根醋酸乙酯部位的化學成分。方法 利用硅膠和Sephadex LH-20等色譜技術進行分離純化，根據(jù)NMR、MS等波譜數(shù)據(jù)和理化性質鑒定化合物結構。結果 從變葉樹參根95%乙醇提取物的醋酸乙酯萃取部位分離鑒定了6個化合物，分別為3,5-二甲氧基-4-羥基反式桂皮醛（1）、3-甲氧基-4-羥基反式桂皮醛（2）、香草酸（3）、香草醛（4）、壬二酸（5）和β-谷甾醇（6）。結論 化合物1～5為首次從該屬植物中分離得到。

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.