1H NMR (400 MHz, CDCl3) δ 7.72 (s, 1H), 7.55 (dd, J = 14.7, 8.2 Hz, 7H), 7.44 (d, J = 8.1 Hz, 4H). 13C{H} NMR (101 MHz, CDCl3) δ 140.68, 139.38, 133.64, 129.41, 128.97, 128.44, 126.21, 125.70. m/z (GC-MS): 298。