¹H NMR (400 MHz, CDCl₃) δ 8.00-7.90 (m, 2H), 7.5-7.49 (m, 2H), 7.47-7.41 (m, 2H), 2.93 (t, J = 7.3 Hz, 2H), 1.89-1.61 (m, 2H), 1.00 (t, J = 7.4 Hz, 3H). ¹³C{H} NMR (101 MHz, CDCl₃) δ 200.3, 137.0, 132.8, 128.4, 127.9, 40.4, 17.7, 13.8。