InChI=1/C20H20N4O4/c1-23(2)20(26)16(11-13-7-4-3-5-8-13)22-19(25)15-12-14-9-6-10-17(24(27)28)18(14)21-15/h3-10,12,16,21H,11H2,1-2H3,(H,22,25)/t16-/m0/s1/f/h22H BF76720281111331