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H2O2 radical scavenging activity of ursolic acid 34, and β-sitosterol-3-O-glucopyranoside 36 at different concentrations (1000 µg/mL, 500 µg/mL, 250 µg/mL, and 125 µg/mL). Bars show mean ± standard deviation (SD). Significant difference among groups is analyzed by a two-way-ANOVA-test.
