InChI=1/C18H14N2O4/c1-11-15(10-12-5-4-6-13(21)9-12)18(24)20(19-11)17(23)14-7-2-3-8-16(14)22/h2-10,21-22H,1H3/b15-10+ 8363A8228E23F8A2