N4,N4-di([1,1'-biphenyl]-4-yl)-N4'-(9,9-dimethyl-9H-fluoren-3-yl)-N4'-phenyl-[1,1'-biphenyl]-4,4'-diamine

N,N-diphenyl-4'-(9,9,13c-trimethyl-9,13c-dihydro-5H-benzo[4,5]pentaleno[1,2,3-kl]acridin-5-yl)-[1,1'-biphenyl]-4-amine

N,N-diphenyl-4'-(2-phenyl-10H-1,2a,10-triazabenzo[4,5]azuleno[1,8,7,6-cdef]fluoren-10-yl)-[1,1'-biphenyl]-4-amine

N,N-diphenyl-4'-(13-phenylbenzo[kl]benzo[4,5]indolo[2,3-a]acridin-4(13H)-yl)-[1,1'-biphenyl]-4-amine

N,N-diphenyl-4'-(11-(4-phenylquinazolin-2-yl)-5H-benzo[4,5]thieno[3,2-c]carbazol-5-yl)-[1,1'-biphenyl]-4-amine

N,N-diphenyl-4'-(11-(4-phenylquinazolin-2-yl)-5H-benzofuro[3,2-c]carbazol-5-yl)-[1,1'-biphenyl]-4-amine

N,N-bis(4-(benzofuran-2-yl)phenyl)-4'-(3,6-di(benzofuran-2-yl)-9H-carbazol-9-yl)-[1,1'-biphenyl]-4-amine

N,N-bis(4-(benzo[b]thiophen-5-yl)phenyl)-4'-(3-(2-phenylbenzo[b]thiophen-5-yl)-9H-carbazol-9-yl)-[1,1'-biphenyl]-4-amine

N,N-di([1,1'-biphenyl]-4-yl)-4'-(9,9,13c-trimethyl-9,13c-dihydro-5H-benzo[4,5]pentaleno[1,2,3-kl]acridin-5-yl)-[1,1'-biphenyl]-4-amine

N-([1,1'-biphenyl]-4-yl)-N-(4'-(9-(dibenzo[b,d]furan-1-yl)-13c-methyl-9,13c-dihydro-5H-indolo[3',2':4,5]cyclopenta[1,2,3-kl]acridin-5-yl)-[1,1'-biphenyl]-4-yl)naphthalen-1-amine

N-([1,1'-biphenyl]-4-yl)-N-(4-(tert-butyl)phenyl)-4'-(6,6-dimethyl-12-aza-6-silaindeno[2,1,7,6-ghij]pleiaden-12(6H)-yl)-[1,1'-biphenyl]-4-amine

N-([1,1'-biphenyl]-4-yl)-N-(4-(adamantan-1-yl)phenyl)-4'-(3-(8-phenyl-8H-fluoreno[4,5-bcd]furan-8-yl)-9H-carbazol-9-yl)-[1,1'-biphenyl]-4-amine

N-([1,1'-biphenyl]-4-yl)-N-(4'-(13c-methyl-9-phenyl-9,13c-dihydro-5H-indolo[3',2':4,5]cyclopenta[1,2,3-kl]acridin-5-yl)-[1,1'-biphenyl]-4-yl)triphenylen-2-amine

N-([1,1'-biphenyl]-4-yl)-N-(4'-(13c-methyl-9-phenyl-9,13c-dihydro-5H-indolo[3',2':4,5]cyclopenta[1,2,3-kl]acridin-5-yl)-[1,1'-biphenyl]-4-yl)naphthalen-1-amine

N-([1,1'-biphenyl]-4-yl)-N-(4'-(9-([1,1'-biphenyl]-4-yl)-13c-methyl-9,13c-dihydro-5H-indolo[3',2':4,5]cyclopenta[1,2,3-kl]acridin-5-yl)-[1,1'-biphenyl]-4-yl)naphthalen-1-amine

N-([1,1'-biphenyl]-4-yl)-N-(4'-(13,13-dimethyl-7,7-diphenyl-7H-indeno[1,2-c]acridin-12(13H)-yl)-[1,1'-biphenyl]-4-yl)-[1,1':2',1''-terphenyl]-4'-amine

N-([1,1'-biphenyl]-4-yl)-N-(4'-(3-(8-phenyl-8H-fluoreno[4,5-bcd]furan-8-yl)-9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)naphthalen-1-amine

N-([1,1'-biphenyl]-4-yl)-N-(4'-(2-phenyl-9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-9,9'-spirobi[fluoren]-2-amine

N-([1,1'-biphenyl]-4-yl)-4'-(9-(4,6-diphenyl-1,3,5-triazin-2-yl)-13c-methyl-9,13c-dihydro-5H-indolo[3',2':4,5]cyclopenta[1,2,3-kl]acridin-5-yl)-N-phenyl-[1,1'-biphenyl]-4-amine

N-([1,1'-biphenyl]-4-yl)-4'-(9H-carbazol-9-yl)-N-(4-(11,11-dimethyl-10,11-dihydro-5H-5,10-[1,2]benzenodibenzo[a,d][7]annulen-6-yl)phenyl)-[1,1'-biphenyl]-4-amine