¹H NMR (400 MHz, CDCl₃) δ 7.43 – 7.23 (m, 5H), 5.69 (s, 1H), 5.23 (s, 1H), 3.46 (t, J = 5.5 Hz, 2H), 2.53 (t, J = 6.3 Hz, 2H), 1.97 – 1.83 (m, 4H). ¹³C NMR (101 MHz, CDCl₃) δ 169.64, 147.88, 135.51, 128.45, 128.31, 125.27, 111.74, 50.51, 32.58, 23.28, 21.36. GC-MS (m/z): 201。