目的研究山菍Rhodomyrtus tomentosa茎枝的化学成分。方法采用硅胶柱色谱和重结晶方法对山菍茎枝80%乙醇提取液进行分离,得到6个化合物,通过理化性质和波谱技术鉴定其结构。结果 6个化合物分别鉴定为正三十四烷醇(1)、3-乙酰基齐墩果酸(2)、3β-乙酰氧基-11α,12α-环氧齐墩果烷-28,13-内酯(3)、没食子酸(4)、2α,3β,23-三羟基齐墩果酸(5)、没食子酸乙酯(6)。结论除了化合物3,其他化合物为首次从该植物中分离得到。 Objective To study the chemical composition of stems and leaves of Rhodomyrtus tomentosa. Methods Silica gel column chromatography and recrystallization method were used to separate 80% ethanol extract of Scutellaria barbata. Six compounds were obtained and identified by their physicochemical properties and spectral analysis. Results Six compounds were identified as n-tetratriol (1), 3-acetyl oleanolic acid (2), 3β-acetoxy-11α, 12α-epoxy oleanane-28,13- Lactone (3), gallic acid (4), 2α, 3β, 23-trihydroxyoleic acid (5), gallic acid ethyl ester (6). Conclusion In addition to compound 3, other compounds were isolated from this plant for the first time.