Flavones from Elsholtzia stauntonii

Structures of two new flavones isolated from Elsholtzia stauntonii Benth (Chinese name "Muxiangru", Berberidaceae) have been determined by spectroscopic methods as 5-hydroxy-7,5'-dimethoxy-6,8-dimethyl-3',4'-methylenedioxy flavone 1 and 5-hydroxy-7-methoxy-8-methyl-3',4'-methylenedioxy-5'-(3-methyl-but-2-enyl)-3',4'-methylenedioxy flavone 2, along with two known flavones, 5-hydroxy-7,4'-dimethoxy-6 -methylflavone 3, and 5-hydroxy-6,7-dimethoxyflavone 4.