¹H NMR (400 MHz, CDCl₃) δ 7.88 (s, 1H), 7.64 (d, J = 7.6 Hz, 2H), 7.56 (t, J = 7.5 Hz, 1H), 7.45 (d, J = 7.8 Hz, 2H), 7.36 – 7.24 (m, 4H), 6.99 (d, J = 8.1 Hz, 2H), 3.93 (s, 6H). ¹³C{H} NMR (101 MHz, CDCl₃) δ 159.94, 142.63, 141.60, 129.76, 129.09, 126.26, 126.14, 119.72, 112.97, 112.78, 55.26. m/z (GC-MS): 290。