¹H NMR (400 MHz, CDCl₃) δ 8.82 (d, J = 2.2 Hz, 2H), 8.00 (t, J = 2.2 Hz, 1H), 7.51-7.38 (m, 4H), 7.36-7.30 (m, 2H), 7.17-7.09 (m, 2H). ¹³C{H} NMR (101 MHz, CDCl₃) δ 163.2 (d, J = 246.9 Hz), 147.4, 139.7 (d, J = 7.7 Hz), 135.5 (d, J = 2.3 Hz), 132.8, 130.7 (d, J = 8.3 Hz), 122.9 (d, J = 2.9 Hz), 115.2 (d, J = 21.1 Hz), 114.2 (d, J = 22.3 Hz)。