目的:对密脉鹅掌柴的化学成分进行研究。方法:采用硅胶柱色谱、Rp-C8 柱色谱等方法分离化学成分, 应用UV、IR、MS、NMR、2D-NMR 等方法进行结构分析。结果: 从密脉鹅掌柴中分离鉴定了2个新的化合物:3-O-β-D-吡喃葡萄糖醛酸基-14-醛基-白桦脂酸苷-28-O-β-D-吡喃葡萄糖(1),3-O-β-D-吡喃葡萄糖基(1→2)-β-D-吡喃葡萄糖基-14-醛基-白桦脂酸苷-28-O-β-D-吡喃葡萄糖(2)。结论:化合物1和2为新的羽扇豆烷型三萜。 Objective: To study the chemical constituents of Schefflera chinensis. Methods: The chemical constituents were isolated by silica gel column chromatography and Rp-C8 column chromatography. The structures of the compounds were analyzed by UV, IR, MS, NMR and 2D-NMR. RESULTS: Two new compounds were isolated and identified from Schefflera magna: 3-O-β-D-glucopyranosyl-14-aldehyde-betulinoside-28-O-β-D Glucopyranosyl (1 → 2) -β-D-glucopyranosyl-14-aldehyde-betacin-28-O-β -D-glucopyranose (2). Conclusion: Compounds 1 and 2 are new lupane-type triterpenes.