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Radical scavenging activity of PL. (A) 2,2-azinobis-(3-ethyl-benzthiazolin-6-sulphonic acid) (ABTS) radical cation and (B) 2,2-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging activities at concentrations of 2–250 μg/mL. SB, Scutellaria baicalensis.
