Synonyms: Cuprate(4-), (5-(2-(4-((4-(2-(2,4-dihydroxy-5-(2-(8-(hydroxy-kappaO)-7-(2-(2-(hydroxy-kappaO)phenyl)diazenyl-kappaN1)-3,6-disulfo-1-naphthalenyl)diazenyl)phenyl)diazenyl)phenyl)amino)-3-sulfophenyl)diazenyl)-2-hydroxybenzoato(6-))-, sodium (1:4);Copper, (5-((4-((4-((5-((8-hydroxy-7-((2-hydroxyphenyl)azo)-3,6-disulfo-1-naphthyl)azo)-2,4-dihydroxyphenyl)azo)phenyl)amino)-3-sulfophenyl)azo)-2-hydroxybenzoato(2-))-, tetrasodium salt;Cuprate(4-), (5-((4-((4-((2,4-dihydroxy-5-((8-(hydroxy-kappaO)-7-((2-(hydroxy-kappaO)phenyl)azo-kappaN1)-3,6-disulfo-1-naphthalenyl)azo)phenyl)azo)phenyl)amino)-3-sulfophenyl)azo)-2-hydroxybenzoato(6-))-, tetrasodium;Tetrasodium (5-((4-((4-((2,4-dihydroxy-5-((8-hydroxy-7-((2-hydroxyphenyl)azo)-3,6-disulpho-1-naphthyl)azo)phenyl)azo)phenyl)amino)-3-sulphophenyl)azo)salicylato(6-))cuprate(4-);copper(2+) sodium 2-oxido-5-{2-[4-({4-[(2Z)-2-{4-oxido-6-oxo-3-[(E)-{(7E)-8-oxo-7-[(2E)-(6-oxocyclohexa-2,4-dien-1-ylidene)hydrazinylidene]-3,6-disulfonato-7,8-dihydronaphthalen-1-yl}diazenyl]cyclohexa-2,4-dien-1-ylidene}hydrazinyl]phenyl}amino)-3-sulfonatophenyl]hydrazinyl}benzoate (1:4:1)