InChI=1S/C24H22N4/c1-28-14-20-13-19(23-10-11-24(25)27-26-23)8-9-21(20)22(15-28)18-7-6-16-4-2-3-5-17(16)12-18/h2-13,22H,14-15H2,1H3,(H2,25,27)/t22-/m0/s1