For several years we have screened natural products having aldose reductase (AR) inhibitory activity. 3, 3', 4-Tri-O-methylellagic acid 4'-sulfate potassium salt (2) was isolated from a Mexican herb "Sinfito" (Potentilla candicans) as a potent AR inhibitory active constituent. 2 was more potent (IC<50>=8.0×10<-8>M) than ellagic acid, which is one of the natural inhibitors of AR. So we examined the synthesis of ellagic acid derivatives and found that the sulfate group is one of the important function.
在过去几年里,我们对具有醛糖还原酶(AR)抑制活性的
天然产物进行了筛选。从一种墨西哥香草“Sinfito”(Potentilla candicans)中分离出了3, 3', 4-三-O-甲基
鞣酸4'-
硫酸钾盐(2),作为一种有效的AR抑制活性成分。其活性比
鞣酸更强(IC<50>=8.0×10<-8>M),而
鞣酸是AR的自然
抑制剂之一。因此,我们研究了
鞣酸衍
生物的合成,并发现
硫酸酯基团是一个重要的功能团。