2-Naphthalenol, 1-(2-(4-(2-phenyldiazenyl)phenyl)diazenyl)-, ar',ar''-Me derivs.;1-((p-(Phenylazo)phenyl)azo)-2-naphthol, methyl derivs.;2-Naphthalenol, 1-((4-(phenylazo)phenyl)azo)-, ar',ar''-Me derivs.
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