板栗花中两个新黄酮苷类化合物板栗花中两个新黄酮苷类化合物

Two new flavonoids from the flower of Castanea mollissima Blume

摘要: 目的研究板栗花的活性成分。方法应用硅胶柱色谱和薄层色谱进行分离，应用波谱学方法进行结构鉴定。结果分离得到两个黄酮苷类化合物，分别鉴定为山萘酚-3-O-(6″-反式-对-香豆酰基)-α-D-甘露吡喃糖苷(1)和山萘酚-3-O-(6″，4″-双-反式-对-香豆酰基)-α-D-甘露吡喃糖苷(2)。结论化合物1,2均为新化合物，命名为栗苷A和栗苷B。

Abstract: AimTo study the bioactive constituents from the flower of Castanea mollissima Blume． MethodsCompounds were isolated and purified by column chromatography on silica gel and polyamide．Structures were determined by various spectroscopic data，including UV， IR， ¹H and ₁₃CNMR， EIMS and FABMS， ¹H-₁₃C-COSY and HMBC． ResultsTwo compounds were isolated from the ethyl acetate fraction of 95% ethanol extract and the structures were elucidated as kaempferol-3-O-［6″-(E)-P-coumaroyl］-α-D-mannopyranoside (1) and kaempferol-3-O-［6″，4″-di-(E)-P-coumaroyl］-α-D-mannopyranoside (2)． ConclusionCompounds 1 and 2 are new compounds，named castanoside A and B respectirely．