1H NMR (400 MHz, CDCl3) δ 8.92 (s, 2H), 7.84 (s, 1H), 7.42 – 7.37 (m, 3H), 7.36 – 7.31 (m, 5H), 7.25 – 7.20 (m, 2H), 6.67 (d, J = 3.8 Hz, 1H), 6.36 (d, J = 3.8 Hz, 1H). 13C NMR (101 MHz, CDCl3) δ 151.81, 151.19, 149.27, 140.34, 137.95, 132.51, 130.10, 129.08, 128.38, 128.27, 128.14, 127.91, 127.63, 118.70, 118.62, 100.99. HRMS (EI): calcd for C20H15N3: 297.1266, found: 297.1263。