¹H NMR (400 MHz, CDCl₃) δ 7.57 (s, 1H), 7.40 (d, J = 5.9 Hz, 1H), 7.33 (d, J = 6.6 Hz, 1H), 7.20 (t, J = 7.8 Hz, 1H), 6.66 (dd, J = 17.6, 10.9 Hz, 1H), 5.77 (d, J = 17.5 Hz, 1H), 5.31 (d, J = 10.9 Hz, 1H). ¹³C{H} NMR (101 MHz, CDCl₃) δ 139.6, 135.5, 130.6, 130.0, 129.1, 124.8, 122.7, 115.3。