1H NMR (400 MHz, CDCl3) δ 7.96 (d, J = 13.6 Hz, 1H), 7.55 (d, J = 13.6 Hz, 1H), 7.43 (d, J = 8.1 Hz, 2H), 7.25 (d, J = 8.2 Hz, 2H), 2.40 (s, 3H). 13C{1H} NMR (101 MHz, CDCl3) δ 143.04, 139.08, 136.17, 130.06, 129.12, 127.17, 21.56. GC-MS (m/z): 163.