1H NMR (400 MHz, CDCl3) δ 7.34-7.27 (m, 1H), 7.27-7.18 (m, 2H), 7.12 (d, J = 6.9 Hz, 1H), 6.75 (d, J = 15.9 Hz, 1H), 6.03 (d, J = 15.9 Hz, 1H), 2.65 (q, J = 7.5 Hz, 2H), 1.55 (s, 6H), 1.25 (t, J = 7.2 Hz, 3H). 13C{1H} NMR (101 MHz, CDCl3) δ 144.7, 135.7, 130.1, 128.6, 128.2, 127.8, 126.5, 126.1, 123.9, 34.9, 28.8, 27.7, 15.5. HRMS (ESI) m/z calcd for C14H17NNa+ [M+Na]+: 222.1253, found 222.1259.