¹H NMR (400 MHz, CDCl₃) δ 7.36 (t, J = 7.5 Hz, 2H), 7.29 (d, J = 7.3 Hz, 2H), 7.26-7.17 (m, 3H), 7.07 (d, J = 6.9 Hz, 1H), 6.48 (d, J = 15.9 Hz, 1H), 6.39 (dt, J = 15.7, 6.5 Hz, 1H), 3.59 (d, J = 6.5 Hz, 2H), 2.37 (s, 3H); ¹³C{H} NMR (101 MHz, CDCl₃) δ 140.2, 138.0, 137.4, 131.1, 129.0, 128.6, 128.4, 128.4, 127.9, 126.8, 126.1, 123.3, 39.3, 21.4。