Bigarcinenone A from the bark of Garcinia xanthochymus exhibited potent antioxidant activity in the 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging test with IC50 value of 9.2 μg/mL, compared to the positive control, the well-known antioxidant butylated hydroxytoluene (BHT) with a IC50 of 20 μg/mL (Zhong, et al., 2008).