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1-Naphthalenesulfonic acid, 4-2,4-dihydroxy(4-nitrophenyl)azo4-(phenylamino)-3-sulfophenylazophenylazo-3-hydroxy-7-nitro- Structure

1-Naphthalenesulfonic acid, 4-2,4-dihydroxy(4-nitrophenyl)azo4-(phenylamino)-3-sulfophenylazophenylazo-3-hydroxy-7-nitro-