¹H NMR (400 MHz, CDCl₃) δ 7.56 (s, 2H), 7.52 (s, 2H), 7.40 (d, J = 6.0 Hz, 3H), 7.32 (s, 5H), 7.25 – 7.18 (m, 6H), 7.15 – 7.10 (m, 4H), 6.90 (s, 1H), 6.83 (s, 1H), 6.09 (d, J = 8.4 Hz, 2H), 2.41 (s, 3H), 2.37 (s, 3H). ¹³C NMR (101 MHz, CDCl₃) δ 140.34, 139.92, 139.89, 138.03, 137.92, 137.70, 137.25, 134.81, 131.09, 131.02, 129.83, 129.78, 129.70, 129.12, 129.09, 129.02, 128.35, 128.03, 127.69, 127.35, 127.24, 125.31, 124.83, 106.42, 106.39, 21.28, 21.07. GC-MS (m/z): 260。