¹H NMR (400 MHz, CDCl₃) δ 7.32 (s, 4H), 7.21 (t, 3H), 7.14 (d, J = 7.3 Hz, 4H), 7.08 (d, J = 4.0 Hz, 4H), 7.05 (d, J = 7.0 Hz, 3H), 6.98 (d, J = 7.3 Hz, 2H), 3.92 (s, 2H); ¹³C{H} NMR (101 MHz, CDCl₃) δ 143.1, 142.8, 142.1, 141.6, 140.1, 137.9, 130.7, 129.9, 129.4, 128.7, 128.2, 128.1, 127.7, 127.4, 126.8, 126.2, 126.0, 125.7, 41.4。