Research on Phenolic Acid Constituents from Guangdong Liangcha

In order to analyze chemical constituents and quality standard of Guangdong Liangcha,seven phenolic acid compounds were isolated.Their structures were determined to be chlorogenic acid(1),Ep-coumatic acid(2),caffeic acid(3),p- hydroxybenzoic acid(4),protocatechuric acid(5),protocatechuic acid methyl ester(6),gallic acid(7) according to the physical methods and spectroscopy.Compounds 1,3 and 5 were firstly obtained from Guangdong Liangcha.Six chromatographic peaks of the fingerprint of Guangdong Liangcha were assigned by the HPLC-MS~n method.