1H NMR (400 MHz, CDCl3) δ 7.62 (d, J = 6.9 Hz, 1H), 7.41 (dd, J = 14.3, 6.3 Hz, 6H), 7.35 – 7.27 (m, 6H), 7.18 (d, J = 7.2 Hz, 1H). 13C NMR (101 MHz, CDCl3) δ 196.49, 155.34, 145.28, 133.44, 132.76, 132.44, 130.78, 130.77, 129.99, 129.29, 128.96, 128.79, 128.51, 128.08, 127.75, 122.98, 121.27.