¹H NMR (400 MHz, CDCl₃) δ 9.13 (d, J = 1.9 Hz, 1H), 8.27 (d, J = 1.9 Hz, 1H), 8.15 (d, J = 8.4 Hz, 1H), 7.87 (d, J = 8.1 Hz, 1H), 7.73 (t, J = 7.7 Hz, 1H), 7.68 – 7.55 (m, 3H), 7.49 (d, J = 8.5 Hz, 2H). ¹³C{¹H} NMR (101 MHz, CDCl₃) δ 149.3, 147.2, 136.2, 134.4, 133.3, 132.6, 129.7, 129.4, 129.1, 128.6, 128.0, 127.9, 127.2.