Abstract Two new flavonoids fromPolygonumnepalense have been characterized as 5,4′-dimethoxy-6,7-methylenedioxyflavanone and 5,6,7,2′,3′,41,5′-heptamethoxyflavanone together with three known compounds, 5,6,7,4′-tetramethoxyflavanone, sitosterol and taraxerone. Their structures were confirmed by 13 C and 1 H NMR and other spectroscopic methods.
摘要 来自何首乌的两种新黄酮类化合物已被表征为 5,4'-二甲氧基-6,7-亚甲二氧基黄烷酮和 5,6,7,2',3',41,5'-七甲氧基黄烷酮以及三种已知化合物 5, 6,7,4'-四甲氧基黄烷酮、谷甾醇和蒲公英酮。它们的结构经 13 C 和 1 H NMR 和其他光谱方法证实。
Aiyar et al., Proceedings - Indian Academy of Sciences, Section A, 1957, # 46, p. 238,241