1H NMR (400 MHz, CDCl3) δ 7.41 (d, J = 8.0 Hz, 2H), 7.30 (d, J = 8.1 Hz, 2H), 6.87 (s, 1H), 2.50 (s, 3H). 13C{1H} NMR (101 MHz, CDCl3) δ 140.56, 138.42, 131.35, 129.30, 121.89, 95.08, 16.66. GC-MS (m/z) = 356.