¹H NMR (400 MHz, CDCl₃) δ 8.22 (s, 1H), 8.08 (dd, J = 8.2, 1.2 Hz, 1H), 7.69 (d, J = 7.7 Hz, 1H), 7.48 (t, J = 8.0 Hz, 1H), 6.75 (dd, J = 17.5, 10.9 Hz, 1H), 5.88 (d, J = 17.6 Hz, 1H), 5.43 (d, J = 10.9 Hz, 1H). ¹³C{H} NMR (101 MHz, CDCl₃) δ 148.5, 139.2, 134.6, 132.0, 129.4, 122.3, 120.7, 117.0。