¹H NMR (400 MHz, CDCl₃) δ 8.80 (s, 2H), 8.04 (s, 1H), 7.57 (d, J = 8.1 Hz, 4H), 7.34 (d, J = 8.5 Hz, 4H), 2.73 (q, J = 7.6 Hz, 4H), 1.30 (t, J = 7.6 Hz, 6H). ¹³C{H} NMR (101 MHz, CDCl₃) δ 146.3, 144.5, 136.7, 135.1, 132.7, 128.6, 127.2, 28.6, 15.5。