Synonyms: Cuprate(4-), (5-(acetylamino)-4-(hydroxy-kappaO)-3-(2-(1-(hydroxy-kappaO)-6-sulfo-8-((2-(sulfooxy)ethyl)sulfonyl)-2-naphthalenyl)diazenyl-kappaN1)-2,7-naphthalenedisulfonato(6-))-, hydrogen (1:4);Cuprate(4-), (5-(acetylamino)-4-(hydroxy-kappaO)-3-((1-(hydroxy-kappaO)-6-sulfo-8-((2-(sulfooxy)ethyl)sulfonyl)-2-naphthalenyl)azo-kappaN1)-2,7-naphthalenedisulfonato(6-))-, tetrahydrogen;Tetrahydrogen (5-acetamido-4-hydroxy-3-((1-hydroxy-6-sulpho-8-((2-(sulphooxy)ethyl)sulphonyl)-2-naphthyl)azo)naphthalene-2,7-disulphonato(6-))cuprate(4-);copper; 5-acetamido-4-oxido-3-[[1-oxido-6-sulfonato-8-(2-sulfonatooxyethylsulfonyl)-2-naphthyl]azo]naphthalene-2,7-disulfonate; hydron