InChI=1S/C19H20N8/c1-21-16-11-17(23-18-10-15(26-27-18)13-4-5-13)25-19(24-16)22-14-6-2-12(3-7-14)8-9-20/h2-3,6-7,10-11,13H,4-5,8H2,1H3,(H4,21,22,23,24,25,26,27)