InChI=1/C20H18N4O4/c1-28-20(27)14-6-8-16(9-7-14)23-19(26)18(25)22-12-15-4-2-3-5-17(15)24-11-10-21-13-24/h2-11,13H,12H2,1H3,(H,22,25)(H,23,26)/f/h22-23H E5BBF268CAD8A2A2