¹H NMR (400 MHz, CDCl₃) δ 7.56-7.51 (m, 1H), 7.49 (dd, J = 2.7, 1.6 Hz, 1H), 7.35 (t, J = 7.9 Hz, 1H), 7.12-7.06 (m, 1H), 3.85 (s, 3H), 2.98 (q, J = 7.2 Hz, 2H), 1.22 (t, J = 7.2 Hz, 3H). ¹³C{H} NMR (101 MHz, CDCl₃) δ 200.6, 159.8, 138.3, 129.5, 120.6, 119.2, 112.3, 55.4, 31.9, 8.3。