¹H NMR (400 MHz, CDCl₃) δ 7.40 (t, J = 7.3 Hz, 2H), 7.32 (d, J = 7.3 Hz, 3H), 7.23-7.19 (m, 4H), 7.19-7.14 (m, 1H), 7.11-7.04 (m, 3H), 6.96 (d, J = 7.1 Hz, 2H), 2.21 (s, 3H); ¹³C{H} NMR (101 MHz, CDCl₃) δ 144.0, 143.5, 143.0, 139.3, 135.7, 130.8, 130.0, 129.3, 128.1, 127.8, 127.4, 126.5, 126.2, 125.8, 23.3。