熔点: 155.2-158.0 oC,1H NMR (400 MHz, CDCl3) δ 9.54 (s, 1H), 8.93 (d, J = 7.8 Hz, 1H), 8.67 (s, 1H), 8.55 (d, J = 8.0 Hz, 1H), 8.38 (s, 1H), 8.24 (dd, J = 17.7, 8.0 Hz, 2H), 7.82 (t, J =8.0 Hz, 1H), 7.70 (t, J = 8.0 Hz, 1H). 13C{1H} NMR (101 MHz, CDCl3) δ 175.92, 157.09, 148.75, 148.33, 141.04, 137.99, 136.31, 135.74, 131.59, 131.27, 130.24, 129.94, 128.34, 126.08, 123.75, 120.70. HRMS (ESI) (M+H)+ Calcd. for C16H10N3O6: 340.0565, Found: 340.0563.