1H NMR (400 MHz, CDCl3) δ 7.33 (d, J = 7.6 Hz, 2H), 7.09 (d, J = 7.8 Hz, 2H), 6.78 (s, 1H), 2.49 (s, 3H), 2.34 (s, 3H). 13C{1H} NMR (101 MHz, CDCl3) δ 138.99, 137.91, 136.51, 128.97, 127.73, 97.31, 21.02, 16.62. GC-MS (m/z) = 290