从滇白珠Ｇａｕｌｔｈｅｒｉａ ｙｕｎｎａｎｅｎｓｉｓ（Ｆｒａｎｃｈ．）Ｒｅｈｄ．根的石油醚部分分得 １０个化合物，其中８个化合物经理化性质和波谱分析，它们的结构分别鉴定为β－乙酰谷甾醇（Ⅰ），３β－乙酰基－１２，２５－二烯－达玛烷（Ⅱ），３β－乙酰氧基－２０（２９）－羽扇烯－２８－醛（Ⅲ），３β－乙酰齐墩果酸（Ⅳ），β－谷甾醇（Ⅴ），熊果酸（Ⅵ），豆甾醇（Ⅶ）和３β－羟基－２０（２９）－羽扇烯－２８－醛（Ⅷ）。其中Ⅱ为杜鹃花科植物中首次发现的达玛烷三萜类化合物，化合物Ⅰ、Ⅲ、Ⅷ为杜鹃花科植物中首次报道，其它４个化合物为从该植物中首次分得。 Gaultheria yunnanensis (Franch.) Rehd. The petroleum ether fraction of the root was divided into 10 compounds, of which 8 compounds were characterized by chemical and spectral analyses. Their structures were identified as β-acetyl sitosterol (I), 3β-acetyl-12,25-diene- Malane (II), 3β-Acetoxy-20 (29)-Leupinene-28-aldehyde (III), 3β-Acetyl oleanolic Acid (IV), β-Sitosterol (V), Ursolic Acid ( VI) stigmasterol (VII) and 3β-hydroxy-20 (29)-leupo-28-aldehyde (VIII). Among them, II is a triterpenoid compound first discovered in the azalea family. Compounds I, III, and VIII were first reported in the family Azalea family, and the other four compounds were firstly obtained from the plant.