¹H NMR (400 MHz, CDCl₃) δ 8.80 (s, 1H), 8.20 (d, J = 8.1 Hz, 1H), 8.10 (d, J = 8.3 Hz, 1H), 7.74 (t, J = 7.3 Hz, 1H), 7.64 (t, J = 7.5 Hz, 1H), 7.32 (d, J = 7.9 Hz, 2H), 7.04 (d, J = 7.8 Hz, 2H), 3.89 (s, 3H), 2.67 (s, 3H). ¹³C{¹H} NMR (101 MHz, CDCl₃) δ 159.3, 150.9, 145.8, 141.8, 134.2, 131.0, 130.5, 129.2, 129.2, 128.1, 127.0, 124.2, 114.0, 55.4, 15.8. HRMS (EI) m/z: calcd for C₁₇H₁₅NO, 249.1154; found, 249.1158.