InChI=1/C20H20N4O4/c1-12-7-8-13(11-15(12)17(21)25)22-18(26)19(27)23-16-9-10-24(20(16)28)14-5-3-2-4-6-14/h2-8,11,16H,9-10H2,1H3,(H2,21,25)(H,22,26)(H,23,27)/t16-/m0/s1/f/h22-23H,21H2 23C00702F71A7EAE