for the following products
alpha-Naphthylphenyl benzidine | N,N'-bis-(1-Naphthalenyl)-N,N'-bis-phenyl-(1,1'-biphenyl)-4,4'-diamine | N,N'-bis-(1-Naphthalenyl)-N,N'-diphenylbenzidine | N,N'-bis-(Naphthalen-1-yl)-N,N'-bis(phenyl)benzidine | N,N'-di-[(1-Naphthyl)-N,N'-diphenyl]-1,1'-biphenyl)-4,4'-diamine | [1,1'-Biphenyl]-4,4'-diamine,N4,N4'-di-1-naphthalenyl-N4,N4'-diphenyl and NPD
