3,3'-Dimethoxytriphenylmethane-4,4'-bis(1''-azo-2''-naphthol);1,1'-((Phenylmethylene)bis((2-methoxy-4,1-phenylene)azo))bis(2-naphthol);2-Naphthalenol, 1,1'-((phenylmethylene)bis((2-methoxy-4,1-phenylene)-
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