1H NMR (400 MHz, CDCl3) δ 7.36 (d, J = 7.9 Hz, 2H), 7.25 (d, J = 7.7 Hz, 2H), 6.85 (s, 1H), 2.50 (s, 3H). 13C{1H} NMR (101 MHz, CDCl3) δ 140.13, 138.33, 133.75, 129.01, 128.40, 95.07, 16.65. GC-MS (m/z) = 310.