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目的：对毛梗莶（ＳｉｅｇｅｓｂｅｃｋｉａｇｌａｂｒｅｓｃｅｎｓＭａｋｉｎｏ．）地上部分的化学成分进行分离，并鉴定其化学结构。方法：采用柱层色谱法进行分离，从中分离到６个化合物，用ＩＲ，ＭＳ，１ＨＮＭＲ，１３ＣＮＭＲ和２ＤＮＭＲ等光谱技术鉴定化合物的结构。结果：经光谱鉴定化合物为：化合物Ⅰ大花酸（ｇｒａｎｄｉｆｌｏｒｉｃａｃｉｄ），化合物Ⅱ１６β，１７二羟基贝壳杉烷（１６β，１７ｄｉｈｙｄｒｏｘｙｋａｕｒａｎｅ），化合物Ⅲ阿魏酸（ｆｅｒｕｌｉｃａｃｉｄ），化合物Ⅳ二十七烷醇（ｈｅｐｔａｃｏｓａｎｏｌ），化合物Ⅴβ谷甾醇（βｓｉｔｏｓｔｅｒｏｌ），化合物Ⅵ琥珀酸（ｓｕｃｉｎｉｃａｃｉｄ）。结论：化合物Ⅰ，Ⅱ为ｋａｕｒａｎｅ型二萜类化合物，化合物Ⅲ、Ⅳ、Ⅵ为首次从该植物中分离得到。
OBJECTIVE: To isolate the chemical constituents of aerial parts of Siegesbeckia glabrescens Makino. and to identify their chemical structures. METHODS: Column chromatography was used for separation. Six compounds were isolated and their structures were identified by IR, MS, 1H NMR, 13C NMR and 2D NMR techniques. RESULTS: The compounds identified by the spectrum were: compound I: grandifloric acid, compound II16?, 17-dihydroxy-kaurane, compound III ferulic acid, compound IV II Heptacosanol, a compound Vβ-sitosterol, and compound VI succinic acid. CONCLUSION: Compounds I and II are kaurane diterpenoids. Compounds III, IV and VI were isolated from this plant for the first time.