1H NMR (400 MHz, CDCl3) δ 8.21 (s, 1H), 8.12 (d, J = 7.0 Hz, 1H), 7.51 (d, J = 7.7 Hz, 1H), 7.44 – 7.28 (m, 5H), 7.27 – 7.16 (m, 4H), 6.90 (d, J = 7.1 Hz, 2H), 5.69 (s, 2H). 13C{1H} NMR (101 MHz, CDCl3) δ 182.6, 143.4, 139.0, 138.0, 137.1, 134.9, 134.2, 132.6, 130.8, 130.2, 130.1, 130.0, 129.6, 129.4, 129.4, 129.0, 128.8, 127.6, 127.5, 126.0, 49.5. HRMS (EI) m/z: calcd for C23H16Cl2N2O, 406.0640; found, 406.0642.