1H NMR (400 MHz, CDCl3) δ 7.41 (d, J = 8.0 Hz, 4H), 7.35 (d, J = 8.4 Hz, 4H), 3.15 (s, 3H). 13C{1H} NMR (101 MHz, CDCl3) δ 170.3, 136.3, 135.4, 131.1, 129.1, 126.8, 24.4. HRMS (EI) m/z: calcd for C17H11Cl2NO2, 331.0167; found, 331.0162.