白花蛇舌草黄酮成分的研究

Study on Flavonoids from Hedyotis diffusa Willd

从茜草科植物白花蛇舌草中分离出5个黄酮化合物,经光谱数据分析鉴定它们的结构分别为山柰酚(Ⅰ),山柰酚-3-O-β-D-吡喃葡萄糖苷(Ⅱ),山柰酚-3-O-(6'-O-α-L-鼠李糖基)-β-D-吡喃葡萄糖苷(Ⅲ),槲皮素-3-O-β-D-吡喃葡萄糖苷(Ⅳ)和槲皮素-3-O-(2'-O-葡萄糖基)-β-D-吡喃葡萄糖苷(Ⅴ).其中Ⅰ～Ⅲ和Ⅴ系首次自该植物中分得.

Five flavonoids were isolated from Hedyotis diffusa Willd.Their structures were elucidated as kaempferol (Ⅰ),kaempferol 3-O-β-D-glucopyranoside(Ⅱ),kaempferol 3-O-(6'-O-α-L-rhamnosyl)-β-D-glucopyranoside(Ⅲ),quercetin 3-O-β-D-glucopyranoside(Ⅳ) and quercetin 3-O-(2'-O-β-D-glucopyranosyl)-β-D-glucopyranoside(Ⅴ)by spectroscopic analysis.Compounds Ⅰ～Ⅲ and Ⅴ were originally isolated from H.diffusa.