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Chromatograms of Combretum species developed in BEA (top), CEF (centre), and EMW (bottom) solvent systems and sprayed with 0.2% DPPH in methanol. Yellow zones indicate antioxidant activity of compounds extracted with acetone (Ac), hexane (Hex), dichloromethane (D) and methanol (Met), in lanes from left to right (1–4) for each group.
