1H NMR (400 MHz, CDCl3) δ 8.30 (t, J = 7.4 Hz, 2H), 8.25 – 8.11 (m, 3H), 7.99 (d, J = 8.5 Hz, 1H), 7.90 (d, J = 8.8 Hz, 1H), 7.61 – 7.50 (m, 3H). 13C NMR (101 MHz, CDCl3) δ 159.4, 149.2, 138.9, 137.6, 130.8, 130.0, 129.0, 127.8, 126.1, 125.5, 125.4 – 125.0 (m), 122.8, 120.2.