InChI=1/C21H20N4O4/c26-19(12-25-7-3-5-13-4-1-2-6-16(13)25)23-24-20-14-10-17-18(29-9-8-28-17)11-15(14)22-21(20)27/h1-2,4,6,10-11H,3,5,7-9,12H2,(H,23,26)(H,22,24,27)/p+1/fC21H21N4O4/h22-24H/q+1 D4C308D41187A226