玉米须黄酮类成分的研究

Study on the Chemical Constituents of Flavones from Corn Silk

利用大孔树脂,聚酰胺,ODS,Sephadex LH-20等多种层析手段,对玉米须的水提取物进行分离和纯化,经NMR方法解析其化学结构。从中分离到得3个黄酮类化合物,分别为:刺芒柄花素(7-羟基-4′-甲氧基异黄酮)(Ⅰ),2-″O-α-L-鼠李糖基-6-C-(3-脱氧葡萄糖基)-3′-甲氧基木犀草素(Ⅱ),2-″O-α-L-鼠李糖基-6-C-(6-脱氧-ax-5-甲基-木-己-4-羰基)-3′-甲氧基木犀草素(Ⅲ)。化合物(Ⅰ)、(Ⅱ)在玉米须中首次分得。

The three flavones were isolated from water extracts of corn silk by chromatography on macroporous resin, polyamide, ODS and Sephadex LH-20. Three compounds were identified as formononetin （7-hydroxy-4＇-methoxyisoflavone） （ Ⅰ ） ,2＂-O-α-L-rhamnosyl-6-C-（3-deoxyglucosyl）-3＇-methoxyluteolin（ Ⅱ ） ,2＂-O-α-L-rhamnosyl-6-C-（6-deoxy-ax-5-methyl-xylo-hexos-4-ulosyl）-3＇-methoxyluteolin（Ⅲ）. Compounds （ Ⅰ ） and （ Ⅱ ） were isolated from the corn silk for the first time.