¹H NMR (400 MHz, CDCl₃) δ 7.38 (d, J = 7.7 Hz, 2H), 7.31 (t, J = 7.6 Hz, 2H), 7.22 (t, J = 7.3 Hz, 1H), 5.87 (q, J = 7.1 Hz, 1H), 2.04 (s, 3H), 1.81 (d, J = 7.0 Hz, 3H); ¹³C{H} NMR (101 MHz, CDCl₃) δ 144.0, 135.5, 128.1, 126.4, 125.5, 122.4, 15.5, 14.3。