InChI=1/C20H18N4O4/c1-10-12(11(2)23-20(27)14(10)9-21)7-8-16(25)24-17-13-5-3-4-6-15(13)28-18(17)19(22)26/h3-6H,7-8H2,1-2H3,(H2,22,26)(H,23,27)(H,24,25)/f/h23-24H,22H2 3C111C870A704A69