N,N-diphenyl-4'-(8'H-spiro[adamantane-2,13'-thiochromeno[2,3-c]carbazol]-8'-yl)-[1,1'-biphenyl]-4-amine

N,N-diphenyl-4'-(8H-quinoxalino[2',3':2,3]indeno[1,7-bc]carbazol-8-yl)-[1,1'-biphenyl]-4-amine

N,N-diphenyl-4'-(10,10,13c'-trimethyl-10H-spiro[anthracene-9,9'-benzo[4,5]pentaleno[1,2,3-kl]acridine]-5'(13c'H)-yl)-[1,1'-biphenyl]-4-amine

N,N-diphenyl-4'-(12-phenyl-12,14-diazacyclopenta[def]dibenzo[3,4:5,6]azuleno[7,8,1-mna]phenanthren-14(12H)-yl)-[1,1'-biphenyl]-4-amine

N,N-di([1,1'-biphenyl]-4-yl)-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-amine

N-([1,1'-biphenyl]-4-yl)-N-phenyl-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]thiophen-2-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'-(9-(dibenzo[b,d]furan-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)phenanthren-9-amine

N-([1,1'-biphenyl]-4-yl)-N-(4'-(7,7-diphenylbenzo[c]acridin-12(7H)-yl)-[1,1'-biphenyl]-4-yl)-[1,1':3',1''-terphenyl]-5'-amine

N-([1,1'-biphenyl]-4-yl)-N-(4'-(13c-methylspiro[benzo[4,5]pentaleno[1,2,3-kl]acridine-9,9'-fluorene]-5(13cH)-yl)-[1,1'-biphenyl]-4-yl)naphthalen-1-amine

N-([1,1'-biphenyl]-4-yl)-N-(4'-(13c-methylbenzofuro[3',2':4,5]cyclopenta[1,2,3-kl]acridin-5(13cH)-yl)-[1,1'-biphenyl]-4-yl)triphenylen-2-amine

N-([1,1'-biphenyl]-4-yl)-N-(4'-(3,6-di(benzofuran-2-yl)-9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-7-phenyldibenzo[b,d]thiophen-3-amine

N-([1,1'-biphenyl]-4-yl)-4'-(9-(dibenzo[b,d]thiophen-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'-(9-(dibenzo[b,d]thiophen-4-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)-N-(4'-(13c-methyl-9-(naphthalen-2-yl)-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-(naphthalen-1-yl)-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)-4'-(9H-carbazol-9-yl)-N-(4-(spiro[indolo[3,2,1-de]acridine-8,9'-xanthen]-12-yl)phenyl)-[1,1'-biphenyl]-4-amine

N-([1,1'-biphenyl]-4-yl)-4'-(9H-carbazol-9-yl)-N-(4-(spiro[indolo[3,2,1-de]acridine-8,9'-xanthen]-9-yl)phenyl)-[1,1'-biphenyl]-4-amine

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

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