InChI=1S/C20H14N6O2/c27-20(17-5-2-8-28-17)23-14-4-1-3-12(9-14)18-15-10-13(19-21-11-22-26-19)6-7-16(15)24-25-18/h1-11H,(H,23,27)(H,24,25)(H,21,22,26)