¹H NMR (400 MHz, CDCl₃) δ 8.63 (s, 1H), 7.70 (d, J = 8.1 Hz, 1H), 7.45 – 7.39 (m, 1H), 7.35 (d, J = 7.0 Hz, 2H); ¹³C NMR (101 MHz, CDCl₃) δ 161.0 (s), 133.1 (s), 131.5 (s), 131.2 (s), 127.7 (s), 126.2 (s), 124.2 (s), 115.9 (s). HRMS (EI): calculated for C₉H₅N₂O₃Br: 267.9484; found: 267.9480.