4'-(15,15-dimethyl-5-phenyl-5H-benzo[c]indolo[3,2-a]acridin-10(15H)-yl)-N,N-diphenyl-[1,1'-biphenyl]-4-amine

N,N-diphenyl-4'-(5,5,9,9-tetramethyl-5H-diindeno[2,1-b:1',2'-h]carbazol-7(9H)-yl)-[1,1'-biphenyl]-4-amine

4'-(7,7-dimethylindeno[1,2-a]carbazol-12(7H)-yl)-N-(3-(naphthalen-2-yl)phenyl)-N-phenyl-[1,1'-biphenyl]-4-amine

N-(4'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-4-yl)-11,11-dimethyl-N-phenyl-11H-benzo[a]fluoren-9-amine

N-(4-(9H-carbazol-9-yl)phenyl)-4'-(5H-benzofuro[3,2-c]carbazol-5-yl)-N-phenyl-[1,1'-biphenyl]-4-amine

4'-(7H-benzo[c]benzofuro[3,2-g]carbazol-7-yl)-N,N-diphenyl-[1,1'-biphenyl]-4-amine

4'-(5-([1,1'-biphenyl]-4-yl)-5,5a-dihydroindolo[3,2-a]carbazol-12(1H)-yl)-N,N-diphenyl-[1,1'-biphenyl]-4-amine

4'-(7,7-dimethylindeno[1,2-a]carbazol-12(7H)-yl)-N,N-di-p-tolyl-[1,1'-biphenyl]-4-amine

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

4'-(7H-benzo[c]carbazol-7-yl)-N-(4-methoxyphenyl)-N-phenyl-[1,1'-biphenyl]-4-amine

4'-(13',13'-dimethylspiro[fluorene-9,8'-naphtho[2,3-c]carbazol]-5'(13'H)-yl)-N,N-diphenyl-[1,1'-biphenyl]-4-amine

4'-(17H-benzo[4,5]imidazo[1,2-f]benzo[6,7]indolo[3,2-b]phenanthridin-17-yl)-N,N-diphenyl-[1,1'-biphenyl]-4-amine

4'-(4H-benzo[6,7]oxepino[2,3,4,5-def]carbazol-4-yl)-N-(4-(naphthalen-2-yl)phenyl)-N-phenyl-[1,1'-biphenyl]-4-amine

4'-(17H-benzo[4,5]imidazo[1,2-f]benzo[4,5]indolo[2,3-j]phenanthridin-17-yl)-N,N-diphenyl-[1,1'-biphenyl]-4-amine

4'-(4H-benzo[6,7]oxepino[2,3,4,5-def]carbazol-4-yl)-N,N-diphenyl-[1,1'-biphenyl]-4-amine

4'-(17H-benzofuro[2,3-a]phenanthro[9,10-h]carbazol-17-yl)-N,N-diphenyl-[1,1'-biphenyl]-4-amine

4'-(14,14-diphenylnaphtho[2,3-b]acridin-5(14H)-yl)-N,N-di-p-tolyl-[1,1'-biphenyl]-4-amine

4'-(7,7-diphenyldinaphtho[1,2-c:2',1'-h]acridin-16(7H)-yl)-N,N-diphenyl-[1,1'-biphenyl]-4-amine

4'-(5H-benzo[b]carbazol-5-yl)-N-(4-(tert-butyl)phenyl)-N-phenyl-[1,1'-biphenyl]-4-amine

4'-(5H-benzo[b]carbazol-5-yl)-N-(4-(naphthalen-1-yl)phenyl)-N-phenyl-[1,1'-biphenyl]-4-amine