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disodium 8-(phenylamino)-5-[[4-(phenylazo)-6-sulphonato-1-naphthyl]azo]naphthalene-1-sulphonate Structure

disodium 8-(phenylamino)-5-[[4-(phenylazo)-6-sulphonato-1-naphthyl]azo]naphthalene-1-sulphonate