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Pulichalconoid B protects astrocytes from H2O2-induced cell death. Astrocytes were treated with different concentrations of pulichalconoid B or quercetin. H2O2 (200 μM) was added 2 h after the addition of pulichalconoid B or quercetin, and cell death was determined 20 h later. The results are means ± SEM of two experiments (n = 8). Statistical analyses were performed with one-way ANOVA followed by the Tukey-Kramer multiple comparison tests. **P < 0.01, ***P < 0.001.
