¹H NMR (400 MHz, CDCl₃) δ 9.83 (d, J = 2.2 Hz, 1H), 7.89 – 7.78 (m, 3H), 7.70 (s, 1H), 7.54 – 7.46 (m, 2H), 7.37 – 7.30 (m, 1H), 3.85 (d, J = 2.0 Hz, 2H). ¹³C NMR (101 MHz, CDCl₃) δ 199.29, 133.60, 132.55, 129.27, 128.73, 128.50, 127.72, 127.58, 127.40, 126.41, 126.04, 50.68. GC-MS (m/z): 170。