¹H NMR (400 MHz, CDCl₃) δ 8.80 (s, 1H), 8.05 (d, J = 8.3 Hz, 1H), 7.99 (d, J = 8.8 Hz, 1H), 7.66 (d, J = 8.8 Hz, 1H), 7.54 (s, 1H), 7.34 (dd, J = 8.0, 4.2 Hz, 1H), 7.20 (d, J = 13.0 Hz, 1H), 5.97 (d, J = 12.9 Hz, 1H), 3.75 (s, 3H). ¹³C NMR(101 MHz, CDCl₃) δ 150.08, 149.21, 147.10, 135.42, 134.80, 129.52, 128.76, 126.98, 123.01, 121.32, 104.65, 56.75. GC-MS (m/z): 185。