¹H NMR (400 MHz, CDCl₃) δ 8.04 (d, J = 2.0 Hz, 1H), 7.78 (dd, J = 8.4, 2.0 Hz, 1H), 7.54 (d, J = 8.3 Hz, 1H), 2.96 (q, J= 7.2 Hz, 2H), 1.22 (t, J = 7.2 Hz, 3H). ¹³C{H} NMR (101 MHz, CDCl₃) δ 198.4, 137.4, 136.4, 133.3, 130.7, 130.0, 127.0, 31.9, 8.0。