InChI=1/C18H20N4O4/c23-15-3-1-13(17(25)9-15)11-19-21-5-7-22(8-6-21)20-12-14-2-4-16(24)10-18(14)26/h1-4,9-12,23-26H,5-8H2/b19-11-,20-12- BE00CD7DF32C6270