1H NMR (400 MHz, CDCl3) δ 7.73 – 7.65 (m, 1H), 7.46 – 7.31 (m, 5H), 7.21 (d, J = 3.2 Hz, 1H), 7.18 – 7.10 (m, 3H), 6.65 (d, J = 3.2 Hz, 1H), 5.61 (s, 1H), 5.40 (s, 1H). 13C NMR (101 MHz, CDCl3) δ 144.95, 137.00, 136.40, 129.26, 129.10, 128.65, 128.54, 126.90, 121.96, 120.90, 120.16, 111.85, 108.06, 103.06. GC-MS (m/z): 219。
