¹H NMR (400 MHz, CDCl₃) δ 9.18 (d, J = 2.2 Hz, 1H), 8.27 (d, J = 2.1 Hz, 1H), 8.15 (d, J = 8.4 Hz, 1H), 7.86 (d, J = 8.1 Hz, 1H), 7.71 (t, J = 7.7 Hz, 1H), 7.56 (t, J = 7.5 Hz, 1H), 7.52 – 7.42 (m, 2H), 7.28 (d, J = 7.7 Hz, 1H), 2.38 (s, 3H), 2.34 (s, 3H). ¹³C{¹H} NMR (101 MHz, CDCl₃) δ 149.9, 147.0, 137.4, 136.7, 135.3, 133.8, 132.8, 130.4, 129.1, 129.1, 128.5, 128.1, 127.9, 126.9, 124.7, 19.9, 19.5. HRMS (EI) m/z: calcd for C₁₇H₁₅N, 233.1204; found, 233.1209.