Chlorogenic acid, caffeic acid, ferulic acid, isoquercitrin,p-coumaric acid (>98.0%) were purchased from Chengdu Biopurify Phytochemicals . Acetonitrile and formic acid of HPLC grade were from Merck reagents
Chlorogenic acid, caffeic acid, ferulic acid, isoquercitrin,p-coumaric acid (>98.0%) were purchased from Chengdu Biopurify Phytochemicals . Acetonitrile and formic acid of HPLC grade were from Merckreagents