InChI=1S/C21H17N7/c22-19-18-20(27-21(23)26-19)24-11-15(25-18)12-28-16-7-3-1-5-13(16)9-10-14-6-2-4-8-17(14)28/h1-11H,12H2,(H4,22,23,24,26,27)