Figure 2From: Antioxidant properties of xanthones from Calophyllum brasiliense: prevention of oxidative damage induced by FeSO4 Xanthones III and V are able to scavenge (a) O 2 •− , (b) OH ● and (c) ONOO − in a concentration-dependent manner. In vitro systems of ROS production were assessed and subjected to different concentrations of xanthones (0.5-1,000 μM). Both xanthones showed an effective capacity as scavengers of O2 •−, OH● and ONOO−. Data are presented as mean values ± S.E.M. of seven experiments per group.Back to article page