¹H NMR (400 MHz, CDCl₃) δ 9.00 (s, 1H), 8.25 (d, J = 8.2 Hz, 1H), 8.07 – 7.88 (m, 5H), 7.77 (t, J = 7.0 Hz, 1H), 7.69 – 7.50 (m, 4H), 7.47 (s, 1H). ¹³C{¹H} NMR (101 MHz, CDCl₃) δ 149.6, 148.9, 148.3, 135.3, 133.2, 133.1, 129.6, 129.6, 128.8, 128.2, 127.8, 127.3, 126.9, 126.9, 126.8, 126.7, 126.0, 121.6. HRMS (ESI) m/z: calcd for C₁₉H₁₄N [M+H], 256.1126; found, 256.1120.