InChI=1S/C16H18N8O2/c1-18-16(25)13-11(7-12(17)21-22-13)20-10-6-4-5-9(14(10)26-3)15-19-8-24(2)23-15/h4-8H,1-3H3,(H,18,25)(H3,17,20,21)/i1D3