Polyphenols from Potentilla discolor Bunge

OBJECTIVE To study the polyphenols of Potentilla discolor Bunge.METHODS The crude drug of Potentilla discolor was extracted with 95% ethanol and purified by repeated chromatographic methods.The structures of the isolated compounds were elucidated by physicochemical and spectral analysis.RESULTS Eleven compounds were yielded and identified as: kaempferol(1),apigenin(2),luteolin(3),quercetin(4),quercetrin(5),tribuloside(6),kaempferol-3-O-β-D-glucuronide(7),ellagic acid(8),ellagic acid-3-O-methyl ether(9),ellagic acid-3-O-methyl ether-4-O-α-L-rhamnopyranoside(10) and gallic acid(11).CONCLUSION Compound 2,3 and 9 were obtained from Potentilla discolor Bunge for the first time,and compound 9 was yielded from the genus of Potentilla for the first time.