InChI=1/C18H18N4O4/c1-11-3-4-12(2)15(9-11)22-16(23)6-5-14(21-22)18(25)20-19-17(24)13-7-8-26-10-13/h3-4,7-10H,5-6H2,1-2H3,(H,19,24)(H,20,25)/f/h19-20H 519A159547E385AD