InChI=1S/C22H18N4O2/c27-21-22(28,18-6-2-4-8-20(18)26-21)10-16-13-23-12-15(25-16)9-14-11-24-19-7-3-1-5-17(14)19/h1-8,11-13,24,28H,9-10H2,(H,26,27)/t22-/m0/s1