InChI=1S/C19H16N8O/c28-7-6-26-12-15(9-22-26)17-10-21-18-19(23-17)27(25-24-18)11-13-3-4-16-14(8-13)2-1-5-20-16/h1-5,8-10,12,28H,6-7,11H2