Inhibitory effect of different species of hydroxygenkwanin on UGTs and UGT1A1 activities Research Progress on UDP-glycosyltransferases in Grape Secondary Metabolism Pathway In vitro and In vivo effects of six Coptidis alkaloids on liver microsomes UGTs and UGT1A1 activities in rats and mice In vitro effects of Genkwa Flos chloroform extract on activity of human liver microsomes UGTs and UGT1A1