¹H NMR (400 MHz, CDCl₃) δ 7.90 (d, J = 8.4 Hz, 2H), 7.43 (d, J = 8.4 Hz, 2H), 2.97 (q, J = 7.2 Hz, 2H), 1.22 (t, J = 7.2 Hz, 3H). ¹³C{H}NMR (101 MHz, CDCl₃) δ 199.5, 139.3, 135.2, 129.4, 128.9, 31.8, 8.2。