1H NMR (400 MHz, CDCl3) δ 8.66 (s, 1H), 7.59 (d, J = 8.0 Hz, 2H), 7.28 (d, J = 8.2 Hz, 2H); 13C NMR (101 MHz, CDCl3) δ 160.1 (s), 132.1 (s), 130.5 (s), 124.0 (s), 123.4 (s), 116.0 (s). HRMS (EI): calculated for C9H5N2O3Br: 267.9484; found: 267.9488.