InChI=1S/C18H16N6O2/c25-17(21-10-13-3-1-5-19-8-13)15-7-16(24-12-23-15)18(26)22-11-14-4-2-6-20-9-14/h1-9,12H,10-11H2,(H,21,25)(H,22,26)