1H NMR (400 MHz, CDCl3) δ 7.44 (s, 2H), 7.41 (s, 3H), 7.37 (s, 1H), 7.34 (d, J = 4.1 Hz, 3H), 7.27 (d, J = 12.0 Hz, 1H), 6.22 (s, 1H), 4.72 - 4.64 (m, 1H), 4.64 - 4.49 (m, 2H), 2.71 (q, J = 17.1 Hz, 2H). 13C NMR (100 MHz, CDCl3) δ 142.4, 140.0, 134.4, 128.5, 128.5, 127.7, 127.4, 126.0, 124.8, 122.3, 76.0, 66.9, 34.9.