2,3-Diarylxanthones as strong scavengers of reactive oxygen and nitrogen species: A structure-activity relationship study

Several 2,3-diarylxanthones were tested for their scavenging activity for ROS (O2·-, H2O2, 1O2, HOCl and ROO) and RNS (NO and ONOO−). Structure-activity studies indicate the importance of the number of hydroxyl groups as well as a catechol unit for the scavenging effects.