¹H NMR (400 MHz, CDCl₃) δ 8.70 (d, J = 2.2 Hz, 2H), 7.92 (t, J = 2.1 Hz, 1H), 7.55-7.44 (m, 2H), 7.43-7.38 (m, 2H), 7.38-7.35 (m, 2H), 7.35-7.31 (m, 2H). ¹³C{H} NMR (101 MHz, CDCl₃) δ 148.8, 137.7, 136.6, 134.2, 132.7, 131.3, 130.2, 129.5, 127.1。