Abstract An investigation of the aerial parts of Gutierrezia dracunculoides afforded, in addition to known compounds, three new labdane derivatives, all related to lambertianic acid, 17-hydroxy- and 17-acetoxylambertianic acid and 7α- hydroxylambertianic acid, two esterified and three highly oxygenated flavones, 5,7,4′-trihydroxy-3,3′-dimethoxy- flavone-4′- O - [2-methylbutyrate] and isovalerate, 3′
摘要 对 Gutierrezia dracunculoides 地上部分的研究提供了除了已知化合物之外的三种新的劳丹丹衍
生物,它们都与朗伯酸、17-羟基和 17-乙酰氧基朗伯酸和 7α-羟基
琥珀酸有关,两种酯化和三种高度氧化
黄酮,5,7,4'-三羟基-3,3'-二甲氧基-
黄酮-4'-O-[
2-甲基丁酸酯]和
异戊酸酯,3',5'-二羟基-3,5,6,7,8 ,4'-六甲氧基
黄酮、5,3',5'-三羟基-3,6,7,8,4'-五甲氧基
黄酮和 5,7,3',5'-四羟基-3,6,8,4'-四甲氧基
黄酮。通过光谱方法和一些
化学转化阐明了结构。