Figure 1.

Compounds׳ cytoprotection on PC12 cells in H₂O₂ damage model and DPPH radical scavenging activities of chalcone analogues. PC12 cells were pretreated for 24 h (A) or 1 h (B) with chalcone analogues (10 μmol/L), then another 24 h exposure in H₂O₂ (450 μmol/L), finally determined by the MTT assay. The viability of untreated cells is defined as 100%. (C) DPPH radical scavenging rate of chalcone derivatives (20 mg/L). Data are expressed as the mean±SD (n=3). ^#P<0.05 significantly different from control group, ^*P<0.05 significantly different from H₂O₂ group.