1H NMR (400 MHz, CDCl3) δ 8.38 (d, J = 13.6 Hz, 1H), 7.68 (dd, J = 7.8, 1.3 Hz, 1H), 7.57 (dd, J = 7.6, 1.7 Hz, 1H), 7.53 (d, J = 13.6 Hz, 1H), 7.41 – 7.31 (m, 2H). 13C{1H} NMR (101 MHz, CDCl3) δ 138.79, 137.54, 133.96, 132.90, 130.29, 128.43, 128.05, 126.29. GC-MS (m/z): 228.