中文摘要：

目的：研究马缨杜鹃茎叶的化学成分。方法：马缨杜鹃的茎叶部分用70%丙酮-水冷浸提取,所得浸膏运用多种色谱和波谱方法对其化学成分进行分离纯化和结构鉴定。结果：分离和鉴定了8个化合物,分别为：3′,4′,7-三羟基-3,5-二甲氧基黄酮（1）、3′,4′,5,7-四羟基-3-甲氧基黄酮（2）、槲皮素-3-O-β-D-阿拉伯吡喃糖苷（3）、儿茶素（4）、表儿茶素（5）、epicatechin-（2β→O→7,4β→8）-ent-epicatechin（6）、（2S）-4-（3,4-二羟基苯基）-2-丁醇（7）、（3,4-二羟基苯基）-2-乙醇（8）。结论：化合物2、3、6、7、8为首次从该植物中分离得到。

英文摘要：

Objective：To study the chemical constituents of the leaves from Rhododendron delavayi.Methods：The compounds were isolated and purified using column chromatography with silical gel and Sephadex LH-20,and their structures wer identified by their physical and spectral data.Results：Eight compounds were isolated and elucidated as 3＇,4＇,7-trihydroxy-3,5-dimethoxyflavone （1）,3＇,4＇,5,7-tetrahydroxy-3-methoxyflavone（2）,quercetin-3-O-β-D-arabinopyranoxide（3）,catechin（4）,epicatechin（5）,epicate- chin-（2β→O→7,4β→8）-ent-epicatechin（6）,（2S）-4-（3,4-dihydroxyphenyl）-2-butanol（7）,（3,4-dihydroxyphenyl）-2-ethanol（8）. Conclusion：Compounds 2,3,6,7,8 are isolated from this plant for the first time.