InChI=1/C18H14N8O4/c19-16-17(24-30-23-16)26-15(11-4-2-1-3-5-11)14(21-25-26)18(29)22-20-9-10-6-7-12(27)13(28)8-10/h1-9,27-28H,(H2,19,23)(H,22,29)/b20-9+/f/h22H,19H2 5753F0D792E3C3BD