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2,2-Dinaphthylamine

9,10-Di(2-naphthyl)anthracene

N,N-Di(1-naphthyl)-4,4-benzidine

N,N-Di-2-naphthyl-p-phenylenediamine

4,4-Dimethyltriphenylamine

2,4-Dimethyltriphenylamine

Dimethyl trisulfide