¹H NMR (400 MHz, CDCl₃) δ 9.75 (d, J = 2.3 Hz, 1H), 7.25 – 7.13 (m, 4H), 3.66 (d, J = 1.8 Hz, 2H), 2.66 (dd, J = 15.0, 7.5 Hz, 2H), 1.25 (t, J = 7.6 Hz, 3H). ¹³C NMR (101 MHz, CDCl₃) δ 199.67, 143.43, 129.52, 128.90, 128.47, 50.16, 28.44, 15.48. GC-MS (m/z): 148。