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Hydroxyl radical scavenging activity of the P. virgatus MeOH, water extract, and reference compound mannitol. The data represents the percentage of inhibition of deoxyribose degradation. The results are expressed as mean ± S.D. (n = 3). *P < 0.05, **P < 0.01, ***P < 0.001 versus 0 μg/mL.
