¹H NMR (400 MHz, CDCl₃) δ 7.69 (dd, J = 3.8, 1.1 Hz, 1H), 7.60 (dd, J = 4.9, 1.1 Hz, 1H), 7.11 (dd, J = 5.0, 3.8 Hz, 1H), 2.92 (q, J = 7.3 Hz, 2H), 1.22 (t, J = 7.3 Hz, 3H). ¹³C{H} NMR (101 MHz, CDCl₃) δ 193.8, 144.1, 133.1, 131.5, 127.9, 32.5, 8.5。