珙桐叶中的黄酮甙成分

Flavonoid glycosides from the leaves of Davidio involucrata

从珙桐 (DavidioinvolucrataBaill.)叶甲醇提取物的水溶性部分得到 6个黄酮及配糖体成分。经核磁共振谱、质谱和化学鉴定它们是 :山奈酚 (1 ) ,3 O β D 吡喃葡萄糖基 山奈酚甙 (2 ) ,3 O β D 吡喃半乳糖基 山奈酚甙 (3 ) ,槲皮素 (4 ) ,3 O β D 吡喃阿拉伯糖基 槲皮素甙 (5 ) ,3 O β D 吡喃半乳糖基 槲皮素甙 (6) ;均为已知化合物且是首次从珙桐植物中分离得到。

Six known flavones and their glycosides were isolated from the leaves of Davidio involucrata Baill?Their structures were established as Kaempferol(1),Kaempferol-3-O-β-D- glucopyranoside(2),Kaempferol-3-O-β-D-galactopyranoside(3),Quercetin(4),Quercetin-3-O-β-D-arabinopyranoside(5),Quercetin-3-O-β-D-galactopyranoside(6)?The structures of all these compounds were identified on the basis of spectra data.