InChI=1/C15H12N4O4/c16-7-12-13(8-2-1-3-8)19(18-17-12)11-5-9(14(20)21)4-10(6-11)15(22)23/h4-6,8H,1-3H2,(H,20,21)(H,22,23)/p-2/fC15H10N4O4/q-2 52D38C3FE6671C57