¹H NMR (400 MHz, CDCl₃) δ 7.09 (d, J = 5.1 Hz, 1H), 6.94 (dd, J = 5.1, 3.6 Hz, 1H), 6.85 (d, J = 3.6 Hz, 1H), 6.63 (d, J = 15.6 Hz, 1H), 6.46 (d, J = 15.6 Hz, 1H), 2.36 (s, 3H). ¹³C NMR (101 MHz, CDCl₃) δ 142.28, 127.36, 125.45, 123.41, 123.03, 118.56, 14.99. GC-MS (m/z): 156。