2-Bis[(4'-methylphenyl)amino-p-phenyl]-1,1-diphenylethylene;4-(2,2-Diphenylethenyl)-N,N-bis(4-methylphenyl)benzenamine;CTM;N,N-Di(p-tolyl)-4-(b-phenylstyryl)aniline;TPA (hole transport material);a-Phenyl-4'-[bis(4-methylphenyl)amino]stilbene;
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