¹H NMR (400 MHz, CDCl₃) δ 8.84 (s, 2H), 8.08 (s, 1H), 7.48 (s, 2H), 7.45 (s, 1H), 7.43 (s, 1H), 7.33 (s, 1H), 7.31 (s, 1H), 2.41 (d, J = 11.3 Hz, 12H). ¹³C{H} NMR (101 MHz, CDCl₃) δ 146.2, 137.3, 136.8, 136.6, 135.3, 132.6, 130.3, 128.4, 124.5, 19.9, 19.5。