InChI=1S/C25H20N4O4/c1-33-21-9-5-4-8-20(21)27-25(32)19-14-16-6-2-3-7-18(16)22(23(19)30)29-28-17-12-10-15(11-13-17)24(26)31/h2-14,28H,1H3,(H2,26,31)(H,27,32)/b29-22-