¹H NMR (400 MHz, CDCl₃) δ 7.68 (s, 1H), 7.49 (s, 1H), 7.30 (t, J = 7.9 Hz, 1H), 6.98 – 6.91 (m, 3H), 6.35 (s, 1H), 5.60 (s, 1H), 5.19 (s, 1H), 3.79 (s, 3H). ¹³C NMR (101 MHz, CDCl₃) δ 159.57, 145.61, 140.86, 137.22, 129.66, 129.47, 120.49, 114.82, 113.67, 106.47, 105.04, 55.25. HRMS (EI): calcd for C₁₀H₉N₃: 200.0950, found: 200.0947。