¹H NMR (400 MHz, CDCl₃) δ 8.71 (s, 1H), 7.47 (dd, J = 13.4, 7.3 Hz, 1H), 7.38 (t, J = 7.6, 7.2 Hz, 1H), 7.25 (t, J = 7.6, 6.8 Hz, 1H), 7.19 (t, J = 9.3, 9.0 Hz, 1H); ¹³C NMR (101 MHz, CDCl₃) δ 160.7 (d, J = 2.3 Hz), 159.7 (d, J = 249.1 Hz), 131.7 (d, J = 8.4 Hz), 130.4 (d, J = 2.0 Hz), 124.7 (d, J = 3.7 Hz), 116.0 (d, J = 21,3 Hz), 112.7 (d, J = 14.9 Hz), 110.6 (s); ¹⁹F NMR (376 MHz, CDCl₃) δ -113.6 (s, 1F). HRMS (EI): calculated for C₉H₅N₂O₃F: 208.0284; found: 208.0283.