1H NMR (400 MHz, CDCl3) δ 7.48 (d, J = 6.7 Hz, 1H), 7.37 (d, J = 6.8 Hz, 1H), 7.28 – 7.19 (m, 2H), 7.13 (d, J = 15.9 Hz, 1H), 6.05 (d, J = 15.9 Hz, 1H), 1.57 (s, 6H). 13C{1H} NMR (101 MHz, CDCl3) δ 133.99, 133.34, 133.15, 129.78, 129.12, 126.95, 126.87, 126.42, 123.19, 34.90, 27.41. m/z = 205. HRMS (ESI) m/z calcd for C12H12ClNNa+ [M+Na]+: 228.0550, found 228.0556.