¹H NMR (400 MHz, CDCl₃) δ 8.92 (d, J = 2.1 Hz, 2H), 8.02 (dt, J = 4.1, 2.5 Hz, 3H), 7.99-7.90 (m, 4H), 7.65-7.52 (m, 8H). ¹³C{H} NMR (101 MHz, CDCl₃) δ 149.2, 138.6, 136.0, 135.9, 133.8, 131.4, 128.6, 128.4, 127.5, 126.5, 126.0, 125.3, 125.1。