InChI=1/C21H20N4O4/c26-20-6-1-2-9-24(20)16-5-3-4-14(10-16)13-22-21(27)19-12-15-11-17(25(28)29)7-8-18(15)23-19/h3-5,7-8,10-12,23H,1-2,6,9,13H2,(H,22,27)/f/h22H FDC958F928B3388C