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High performance liquid chromatography-ultraviolet (HPLC-UV) chromatograms (272 nm) of the mixed references solution (a), SOR CWE-EA (b), HWE-EA (c), and ME-EA (d). The numbers represent euscaphic acid and/or arjunic acid (1), comic acid (2), gallic acid (3), kaempferol (4), caffeic acid (5), ferulic acid (6), tannic acid (7), coumarin (8), quercetin (9), and chlorogenic acid (10).
