¹H NMR (400 MHz, CDCl₃) δ 8.82 (s, 2H), 7.98 (t, J = 2.1 Hz, 1H), 7.61 (t, J = 1.9 Hz, 2H), 7.51 (dt, J = 7.2, 1.8 Hz, 2H), 7.46-7.38 (m, 4H). ¹³C{H} NMR (101 MHz, CDCl₃) δ 147.3, 139.3, 135.5, 135.1, 132.8, 130.4, 128.4, 127.3, 125.4。