马银花的化学成分研究

目的研究马银花的化学成分。方法利用硅胶色谱分离纯化马银花根的化学成分，根据化合物的理化性质和光谱数据鉴定化合物的结构。结果分离并鉴定了7个化合物，其结构分别为3，5，7-三羟基色原酮-3-O-β-D-吡喃木糖苷(I)，蒲公英赛醇(II)，β-谷甾醇(III)，白桦酸(IV)，槲皮素(V)，槲皮素-3-O-α-L-鼠李糖苷(VI)和葡萄糖(VII)。结论化合物I为新化合物，化合物II-VII为首次从该植物中分离得到。

The chemical constituents of Rhododendron ovatum Planch.

AIM: To study the chemical constituents of Rhododendron ovatum Planch. METHODS: The chemical constituents were isolated and purified by silica gel column chromatography and identified on the basis of their physiochemical and spectral data. RESULTS: Seven compounds were isolated and identified. Their structures were established as 3,5,7-trihydroxylchromone 3-O-beta-D-xylopyranoside (I), taraxerol (II), beta-sitosterol (III), betulinic acid (IV), quercetin (V), quercetin-3-O-alpha-L-rhamnopyranoside (VI), and D-glucose (VII). CONCLUSION: Compound I is a new compound. Compounds II-VII were isolated from this plant for the first time.