Synonyms: Cuprate(4-), (4,5-dihydro-4-(2-(8-(hydroxy-kappaO)-7-(2-(2-(hydroxy-kappaO)-5-methoxy-4-((2-(sulfooxy)ethyl)sulfonyl)phenyl)diazenyl-kappaN1)-6-sulfo-2-naphthalenyl)diazenyl)-5-oxo-1-(4-sulfophenyl)-1H-pyrazole-3-carboxylato(6-))-, sodium;Cuprate(4-), (4,5-dihydro-4-((8-hydroxy-7-((2-hydroxy-5-methoxy-4-((2-(sulfooxy)ethyl)sulfonyl)phenyl)azo)-6-sulfo-2-naphthalenyl)azo)-5-oxo-1-(4-sulfophenyl)-1H-pyrazole-3-carboxylato(6-))-, sodium;Cuprate(4-), (4,5-dihydro-4-((8-hydroxy-7-((2-hydroxy-5-methoxy-4-((2-(sulfooxy)ethyl)sulfonyl)phenyl)azo)-6-sulfo-2-naphthalenyl)azo)-5-oxo-1-(4-sulfophenyl)-1H-pyrazole- 3-carboxylato(6-))-, sodium