摘要
Two novel flavone glycosides, 3′_hydroxy_5,4′_dimethoxy_6,7_methylenedioxyflavone_3_O_[β_D_xylopyranosyl(1→6)]_β_D_glucopyranoside (1) and 5,4′_dimethoxy_3′_isopropenylacetyl_6,7_methylenedioxyflavone_3_O_[β_D_xylopyranoxyl(1→6)]_β_D_glucopyranoside (2), were isolated from Polygonum sphaerostachyum Meisn., and their structures were deduced by spectral and chemical methods. This is the first report on the isolation of flavone glycosides from P. sphaerostachyum.
从圆穗蓼 (PolygonumsphaerostachyumMeisn .)中分离得到 2个新黄酮甙 ,经光谱分析和化学方法鉴定为 :3′_羟基_5 ,4′_二甲氧基_6 ,7_二氧亚甲基黄酮_3_O_[β_D_吡喃木糖基 (1→ 6 ) ]_β_D_吡喃葡萄糖甙 (1)和 5 ,4′_二甲氧基_3′_异丙烯基乙酰基_6 ,7_二氧亚甲基黄酮_3_O_[β_D_吡喃木糖基 (1→ 6 ) ]_β_D_吡喃葡萄糖甙 (2 ) ,分别命名为圆穗蓼素A和圆穗蓼素B。
基金
The National Natural Science Foundation of China(29572064)
