InChI=1/C15H10N4O4/c20-11-4-1-9(2-5-11)8-16-18-14-12-7-10(19(22)23)3-6-13(12)17-15(14)21/h1-8,20H,(H,17,18,21)/b16-8+/f/h17H/b16-8+,18-14-	18D243B56369EC60