1H NMR (400 MHz, CDCl3) δ 8.22 (d, J = 0.7 Hz, 1H), 7.83 – 7.77 (m, 1H), 7.43 – 7.36 (m, 5H), 7.34 – 7.29 (m, 1H), 7.24 – 7.17 (m, 2H), 5.64 (s, 1H), 5.62 (s, 1H). 13C NMR (101 MHz, CDCl3) δ 145.11, 139.76, 136.21, 135.09, 129.03, 128.38, 127.09, 126.53, 124.80, 121.21, 120.92, 111.30, 108.05. GC-MS (m/z): 220。
