¹H NMR (400 MHz, CDCl₃) δ 9.03 (s, 1H), 8.22 (s, 1H), 8.06 (d, J = 9.1 Hz, 1H), 7.70 (d, J = 7.4 Hz, 2H), 7.52 (t, J = 7.4 Hz, 2H), 7.44 (t, J = 7.3 Hz, 1H), 7.38 (d, J = 9.1 Hz, 1H), 7.14 (s, 1H), 3.96 (s, 3H). ¹³C{¹H} NMR (101 MHz, CDCl₃) δ 158.2, 147.0, 143.0, 137.9, 134.2, 132.4, 130.3, 129.1, 128.1, 127.4, 122.4, 105.3, 55.6. HRMS (EI) m/z: calcd for C₁₆H₁₃NO, 235.0997; found, 235.1001.