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The chromatogram for the standards obtained by gradient elution on reversed phase C-18 column and Photo-Diode Array detector at 280 nm. Peak 1, protocatechuic acid; peak 2, catechin; peak 3, chlorogenic acid; peak 4, epicatechin; peak 5, ferulic acid; peak 6, coumarin; peak 7, rutin; peak 8, myricetin; peak 9, cinnamic acid; peak 10, genistein. mAU: miliabsorbance unit.
