¹H NMR (400 MHz, CDCl₃) δ 7.99-7.89 (m, 2H), 7.01-6.88 (m, 2H), 3.86 (s, 3H), 2.94 (q, J = 7.3 Hz, 2H), 1.21 (t, J = 7.3 Hz, 3H). ¹³C{H} NMR (101 MHz, CDCl₃) δ 199.4, 163.3, 130.2, 130.0, 113.6, 55.4, 31.4, 8.4。