Compounds 1 and 2, with IC50 values of 43.2 and 79.6 íg/mL, respectively, exhibited moderate activities as free-radical scavengers in the DPPH assay, in comparison with reference antioxidants such as ascorbic acid (IC50:22íg/mL), 2(3)-tert-butyl-4-hydroxyanisole (IC50:21íg/mL), caffeic acid (IC50:12íg/mL), gallic acid (IC50:5íg/mL), and nordihydroguaiaretic acid (12 íg/mL).