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High-performance liquid chromatography analysis of a standard mixture containing chlorogenic acid (Rt: 8.9 min), caffeic acid (Rt: 12.3 min), ferulic acid (Rt: 20.25 min), rutin (Rt: 23.1 min), quercetin (Rt: 36.5 min), luteolin (Rt: 37.3 min), apigenin (Rt: 40.3 min)
