[Studies on flavones in the leaves of Cyclocarya paliums (batal.) Iljinsk]

To do investigation of flavones from the leaves of Cyclocarya paliums (Batal.) Iljinsk. The pure products were isolated by column chromatography of silica gel, thin layer chromatography of silica gel and column chromatography of Sephadex LH-20, their chemical structures were elucidated by NMR, IR and UV spectroscopic evidence. Four flavones were isolated from the leaves of Cyclocarya paliums. They are quercetin (I), kaempferol (II), kaempferol-7-O-alpha-L-rhamnopyranosyl (III) ,and kaempferol-4'-methoxyl-7-O-beta-D-mancopyranosyl (IV). Compounds III and IV are obtained for the first time from this plants.