InChI=1/C18H18N4O4/c23-17(8-5-14-3-6-16(7-4-14)22(25)26)20-11-9-18(24)21-13-15-2-1-10-19-12-15/h1-8,10,12H,9,11,13H2,(H,20,23)(H,21,24)/b8-5+/f/h20-21H 542107728CCB7967