¹H NMR (400 MHz, CDCl₃) δ 8.14 (d, J = 7.6 Hz, 2H), 8.10 (d, J = 8.8 Hz, 2H), 7.87 (d, J = 8.7 Hz, 1H), 7.78 (s, 1H), 7.64 (d, J = 8.9 Hz, 1H), 7.49 (dt, J = 14.0, 7.6 Hz, 3H). ¹³C NMR (100 MHz, CDCl₃) δ 157.6, 146.6, 139.2, 135.9, 132.0, 131.3, 130.6, 129.6, 128.9, 127.7, 127.6, 126.2, 119.8.