InChI=1S/C21H19N5/c1-2-6-17(7-3-1)19-11-20(23-13-15-5-4-10-22-12-15)26-21(25-19)18(14-24-26)16-8-9-16/h1-7,10-12,14,16,23H,8-9,13H2