1H NMR (400 MHz, CDCl3) δ 7.48 – 7.22 (m, 10H), 6.51 (s, 1H), 3.82 (s, 3H). 13C NMR (101 MHz, CDCl3) δ 146.31, 140.41, 137.60, 129.81, 128.22, 128.19, 127.93, 126.54, 126.39, 120.54, 60.53. GC-MS (m/z): 210。