¹H NMR (400 MHz, CDCl3) δ 7.55 (d, J = 6.8 Hz, 2H), 7.41 (d, J = 6.0 Hz, 3H), 7.31 (s, 5H), 7.23 (d, J = 6.8 Hz, 2H), 6.83 (s, 1H), 6.09 (s, 1H). ¹³C NMR (101 MHz, CDCl3) δ 140.11, 140.02, 137.89, 130.96, 129.86, 129.10, 128.41, 128.13, 127.77, 127.33, 125.51, 106.53. GC-MS (m/z): 246。