¹H NMR (400 MHz, CDCl₃) δ 7.93 (t, J = 1.9 Hz, 1H), 7.84 (dt, J = 7.9, 1.4 Hz, 1H), 7.56-7.50 (m, 1H), 7.40 (t, J = 7.9 Hz, 1H), 2.98 (q, J = 7.2 Hz, 2H), 1.23 (t, J = 7.2 Hz, 3H). ¹³C{H} NMR (101 MHz, CDCl₃) δ 199.4, 138.4, 134.9, 132.8, 129.9, 128.1, 126.0, 31.9, 8.1。