¹H NMR (400 MHz, CDCl₃) δ 9.16 (d, J = 2.2 Hz, 1H), 8.20 (d, J = 2.2 Hz, 1H), 7.74 – 7.69 (m, 2H), 7.55 – 7.47 (m, 3H), 7.46 – 7.40 (m, 2H), 2.83 (s, 3H), 2.52 (s, 3H). ¹³C{¹H} NMR (101 MHz, CDCl₃) δ 147.6, 144.8, 138.1, 136.6, 136.3, 133.5, 133.1, 132.1, 129.1, 128.2, 127.9, 127.3, 124.9, 21.6, 18.0. HRMS (EI) m/z: calcd for C₁₇H₁₅N, 233.1204; found, 233.1208.