1H NMR (400 MHz, CDCl3) δ 7.18-7.20 (m, 1H), 7.19-7.16 (m, 1H), 7.13-7.15 (m, 1H), 7.12 -7.08 (m, 1H), 6.60 (s, 1H), 2.90-2.84 (t, J = 8.0 Hz, 2H), 2.39 (t, J = 8.0 Hz, 2H), 1.59 (s, 6H). 13C{1H} NMR (101 MHz, CDCl3) δ 139.2, 134.5, 133.3, 127.5, 127.4, 127.1, 126.6, 126.6, 123.8, 123.7, 122.9, 37.7, 28.2, 25.8, 23.7. HRMS (ESI) m/z calcd for C14H16N+[M+H]+: 198.1277, found 198.1279.