¹H NMR (400 MHz, CDCl₃) δ 7.77 (s, 1H), 7.61 (s, 1H), 7.46 – 7.37 (m, 3H), 7.31 (d, J = 6.8 Hz, 2H), 5.79 (s, 1H), 5.54 (s, 1H). ¹³C NMR (101 MHz, CDCl₃) δ 142.93, 134.58, 133.56, 129.83, 128.78, 127.21, 123.88, 109.48. HRMS (EI): calcd for C₁₀H₉N₃: 171.0796, found: 171.0794。