Abstract: We examined the chloroform extract of the leaves and inflorescence of Eupatorium adenophorum Spreng collected in the suburb of Kunming, Yunnan, China. Nine colourless crystals were isolated. Five among them were identified to be dotriacontane ( 1 ) , β-sitosterol( 2), stigmasterol (3), taraxasteryl palmitate ( 4 ) , taraxasteryl acetate ( 5 ) by spectroscopic evidences and compa-rison with standard samples.

Key words: Eupatorium adenophorum

摘要： 紫茎泽兰（Eupatoium adenophorum Spreng)原产中美墨西哥，现在滇南一带广泛分布，对林、牧业生产造成严重危害。其化学成分研究未见报道。从紫茎泽兰的叶和花序中，分到九个单体，经详细光谱解析和与标准品对照,其中五个成分的化学结构分别为：正三十二烷n-dotriacontane(1),β-谷甾醇β-sitosterol （2），豆甾醇stigmasterol(3)，蒲公英醇棕榈酸酯taraxasteryl palmitate（4），蒲公英醇乙酸酯taraxasteryl acetate(5) 。

关键词: 紫茎泽兰, 正三十二烷, β-谷甾醇, 豆甾醇, 蒲公英醇棕榈酸酯, 蒲公英醇乙酸酯