InChI=1S/C21H16N6/c1-13-5-4-8-19(23-13)21-25-18-7-3-2-6-16(18)20(26-21)24-15-9-10-17-14(11-15)12-22-27-17/h2-12H,1H3,(H,22,27)(H,24,25,26)