¹H NMR (400 MHz, CDCl₃) δ 8.79 (s, 2H), 8.00 (s, 1H), 7.46-7.35 (m, 4H), 7.21-7.11 (m, 2H). ¹³C{H} NMR (101 MHz, CDCl₃) δ 145.5, 139.9, 130.5, 129.9, 128.3, 126.3, 124.6。