1H NMR (400 MHz, CDCl3) δ 7.37 (t, J = 6.2 Hz, 2H), 7.28 (s, 1H), 7.19 (d, J = 8.3 Hz, 2H), 7.12 (t, J = 8.3 Hz, 2H), 7.02 (d, J = 8.5 Hz, 2H), 6.81 (d, J = 8.3 Hz, 2H), 3.79 (s, 3H). 19F NMR (376 MHz, CDCl3) δ -110.51 (m), -111.79 (m). 13C NMR (101 MHz, CDCl3) δ 195.12, 164.78, 164.34, 159.39, 152.71, 140.70, 133.05, 131.12, 130.48 (d, J = 8.2 Hz), 128.70, 122.63, 121.79 (d, J = 7.6 Hz), 118.62 (d, J = 22.8 Hz), 116.27, 116.06, 113.81, 111.60 (d, J = 24.7 Hz), 55.21.