1H NMR (400 MHz, CDCl3) δ 7.38 (d, J = 8.1 Hz, 4H), 7.15 (d, J = 8.1 Hz, 4H), 3.14 (s, 3H), 2.36 (s, 6H). 13C{1H} NMR (101 MHz, CDCl3) δ 171.2, 140.0, 135.6, 129.7, 129.3, 125.9, 24.2, 21.5. HRMS (EI) m/z: calcd for C19H17NO2, 291.1259; found, 291.1258.