¹H NMR (400 MHz, CDCl₃) δ 8.80 (s, 2H), 7.97 (s, 1H), 7.57 (d, J = 8.6 Hz, 4H), 7.48 (d, J = 8.5 Hz, 4H). ¹³C{H} NMR (101 MHz, CDCl₃) δ 147.0, 136.0, 135.7, 134.7, 132.6, 129.4, 128.5。