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. Author manuscript; available in PMC: 2009 Mar 18.
Published in final edited form as: Eur J Pharmacol. 2007 Mar 30;566(1-3):58–66. doi: 10.1016/j.ejphar.2007.03.037

Fig. 3.

Fig. 3

Electron spin resonance (ESR) spectra of DPPH and DPPH radical-scavenging activity of different flavonoids: wogonin, baicalin, baicalein, procyanidin B2, and catechin at the same concentration of 50 μM.