Therefore, the quality of the commercial pomegranate peel extracts could be monitored by determining the contents of the monophenols in the pomegranate peels. The contents of the eight monophenols were in order of punicalagin > catechin > ellagic acid > gallic acid > epicatechin > rutin > chlorogenic acid > caffeic acid in Lintong Jingpitian pomegranate peels.