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UPLC-UV chromatogram profile of the ethyl acetate subfraction acquired at 280 nm with the photodiode array detector. The subfraction was solubilized in methanol and injected onto an Acquity UPLC BEH Shield RP18 column (2.1 × 100 mm, 1.7 μm; Waters). Peaks 1: gallic acid; 2: catechin; 3: unknown; 4: unknown.
