InChI=1/C18H14N4O4/c23-17(11-4-5-15-16(8-11)26-10-25-15)20-12-2-1-3-13(9-12)21-18(24)14-6-7-19-22-14/h1-9H,10H2,(H,19,22)(H,20,23)(H,21,24)/f/h20-22H 3C92FA8FE987E525