8-(3′,3′-Dimethylbutyl)-6-hydroxy-2,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidin-3-one (1) and 5-isopentyl-4a,8a-dimethyldecahydronaphthalen-2-ol (2) have been isolated from the aerial part of Sida rhombifolia L. for the first time along with the previously reported stigmasterol. Their structures were established on the basis of spectral and chemical methods.

中文翻译：

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菱叶草地上部分的生物碱和萜类化合物

8-(3',3'-二甲基丁基)-6-羟基-2,6,7,8-四氢吡咯并[1,2-a]嘧啶-3-酮( 1 )和5-异戊基-4a,8a-二甲基十氢萘-2-ol ( 2 ) 与先前报道的豆甾醇一起首次从 Sida rhombifolia L. 的地上部分分离出来。它们的结构是在光谱和化学方法的基础上建立的。