Abstract:

Two novel flavone glycosides, 3′-hydroxy-5,4′-dimethoxy-6,7-methylenedioxyflavone-3-O-［β-D-xylopyranosyl(1→6)］-β-D-glucopyranoside(1)and5,4′-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.

圆穗蓼中的新黄酮甙成分
安红纲1 郑尚珍2* 沈彤2 郑敏燕2  沈序维2

（1. 张掖师范专科学校化学系，甘肃张掖734000；2.  西北师范大学化学系，兰州730070）

摘要：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。

关键词： 圆穗蓼；黄酮甙；圆穗蓼素A；圆穗蓼素B

Key words: Polygonum sphaerostachyum,  flavone glycosides, yuansuiliaine A, yuansuiliaine B