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

N-([1,1'-biphenyl]-4-yl)-4'-(13c-methyl-9-phenyl-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'-(15H-benzo[g]benzo[5,6][1,4]dithiino[2,3-a]carbazol-15-yl)-N-phenyl-[1,1'-biphenyl]-4-amine

N-([1,1'-biphenyl]-4-yl)-4'-(8-(benzo[b]thiophen-2-yl)-11H-benzo[a]carbazol-11-yl)-N-(4-(benzo[b]thiophen-2-yl)phenyl)-[1,1'-biphenyl]-4-amine

N-([1,1'-biphenyl]-4-yl)-4'-(9H-carbazol-9-yl)-N-(3-(2-(triphenylen-2-yl)naphthalen-1-yl)phenyl)-[1,1'-biphenyl]-4-amine

N-(9,9-dimethyl-9H-fluoren-2-yl)-N-(4'-(7,7-diphenylbenzo[c]acridin-12(7H)-yl)-[1,1'-biphenyl]-4-yl)-5,5,10,10-tetramethyl-5,10-dihydrodibenzo[b,e]silin-2-amine

N-(9,9'-spirobi[fluoren]-7-yl)-N-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)dibenzo[b,d]furan-1-amine

N-(4-(tert-butyl)phenyl)-N-(4'-(9,9-dimethylacridin-10(9H)-yl)-[1,1'-biphenyl]-4-yl)dibenzo[b,d]furan-1-amine

N-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-N-phenylspiro[indolo[3,2,1-de]acridine-8,9'-xanthen]-12-amine

N-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-N-([1,1'-biphenyl]-4-yl)-5,10-dihydrospiro[5,10-[1,2]benzenodibenzo[a,d][7]annulene-11,9'-fluoren]-2'-amine

N-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-N-([1,1'-biphenyl]-4-yl)-4b,4b1,8b,12b-tetrahydrodibenzo[2,3:4,5]pentaleno[1,6-ab]inden-2-amine

N-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-N,2-diphenyldibenzo[1,8:3,4]isochromeno[5,6-d]oxazol-11-amine

N-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-N-([1,1'-biphenyl]-4-yl)-7,8,9,10-tetrahydronaphtho[1,2-b]benzofuran-5-amine

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

N-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-N,8-diphenyl-8H-naphtho[1,2,3-kl]acridin-3-amine

N-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-N-phenylnaphtho[1,2,3-kl]thioxanthen-3-amine

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

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

N-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-N-([1,1'-biphenyl]-2-yl)-5,10-dihydrospiro[5,10-[1,2]benzenodibenzo[a,d][7]annulene-11,9'-fluoren]-9-amine

N-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-N-(4-(dibenzo[b,d]furan-4-yl)phenyl)-[1,1':2',1'':4'',1'''-quaterphenyl]-5'-amine