InChI=1S/C28H22N4O2/c33-28(34)18-10-2-6-14-22(18)30-26-20-12-4-8-16-24(20)31-25-19-11-3-7-15-23(19)32(26)27(31)17-9-1-5-13-21(17)29-25/h1-16,25-27,29-30H,(H,33,34)/t25-,26?,27+/m1/s1