¹H NMR (400 MHz, CDCl₃) δ 9.17 (d, J = 1.9 Hz, 1H), 8.25 (s, 1H), 8.15 (d, J = 8.4 Hz, 1H), 7.84 (d, J = 8.1 Hz, 1H), 7.70 (t, J = 7.6 Hz, 1H), 7.55 (t, J = 7.5 Hz, 1H), 7.41 (t, J = 7.9 Hz, 1H), 7.30 – 7.18 (m, 2H), 6.96 (dd, J = 8.2, 1.5 Hz, 1H), 3.87 (s, 3H). ¹³C{¹H} NMR (101 MHz, CDCl₃) δ 160.1, 149.7, 147.2, 139.1, 133.5, 133.2, 130.1, 129.3, 129.0, 127.9, 127.8, 126.9, 119.7, 113.3, 113.1, 55.2.