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...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.展开更多
目的建立辣蓼中没食子酸的含量测定方法。方法采用A g ilentHypersilODS柱(4.0×250mm,5μm);以甲醇-水-冰醋酸为流动相;检测波长:274nm。结果没食子酸的平均回收率为100.7%,RSD为1.0%(n=6)。结论方法简便、快速、准确,可用于辣蓼...目的建立辣蓼中没食子酸的含量测定方法。方法采用A g ilentHypersilODS柱(4.0×250mm,5μm);以甲醇-水-冰醋酸为流动相;检测波长:274nm。结果没食子酸的平均回收率为100.7%,RSD为1.0%(n=6)。结论方法简便、快速、准确,可用于辣蓼的质量控制。展开更多
基金The National Natural Science Foundation of China(29572064)
文摘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.
