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In vitro antioxidant effects of ethanolic extract of Paeonia suffruticosa flowers. Effects of ethanolic extract of P. suffruticosa flowers on DPPH scavenging (A), hydroxyl radical scavenging (B), FRAP assay (C), and inhibition of β-carotene bleaching (D). Data were expressed as mean ± SD (n = 3). VC: vitamin C; BHT: butylated hydroxytoluene; BEE: bud ethanolic extract; FEE: flower ethanolic extract; PEE: petal ethanolic extract; SEE: stamen ethanolic extract.
