1H NMR (400 MHz, CDCl3) δ 7.91 (d, J = 8.1 Hz, 2H), 7.71 (d, J = 8.0 Hz, 2H), 7.26 – 7.30 (m, 1H), 7.13 (d, J = 7.3 Hz, 1H), 7.00 – 7.01 (m, 1H), 6.91 (d, J = 7.8 Hz, 1H), 3.66 (s, 2H), 3.30 (s, 3H), 1.45 (s, 3H); 13C NMR (100 MHz, CDCl3) δ: 24.9, 26.5, 45.2, 46.2, 108.3, 116.5, 117.8, 121.7, 122.3, 128.1, 128.4, 132.4, 133.1, 139.1, 143.8, 180.1, 194.9; HRMS (EI) m/z calcd for C19H16N2O2 [M+]: 304.1212; found 304.1208.