InChI=1/C13H10N2O6/c16-9(3-4-10(17)18)14-6-1-2-7-8(5-6)11(19)13(21)15-12(7)20/h1-2,5H,3-4H2,(H,14,16)(H,17,18)(H,15,20,21)/p-1/fC13H9N2O6/h14-15H/q-1 3A7006BCB3A8AE26