Copper, (tetrahydrogen 3,3'-dihydroxy-4,4'-bis((3-methyl-5-oxo-1-(5,7-disulfonato-2-naphthenyl)-2-pyrazolin-4-yl)azo)-1,1'-biphenyl)di-, tetrasodium salt;Cuprate(4-), (mu-((6,6'-((3,3'-di(hydroxy-kappaO)(1,1'-biphenyl)-4,4'-diyl)bis((2,1-diazenediyl-kappaN1)(4,5-dihydro-3-methyl-5-(oxo-kappaO)-1H-pyrazole-4,1-diyl)))bis(1,3-naphthalenedisulfonato))(8-)))di-, sodium (1:4);Cuprate(4-), (mu-((6,6'-((3,3'-di(hydroxy-kappaO)(1,1'-biphenyl)-4,4'-diyl)bis((azo-kappaN1)(4,5-dihydro-3-methyl-5-(oxo-kappaO)-1H-pyrazole-4,1-diyl)))bis(1,3-naphthalenedisulfonato))(8-)))di-, tetrasodium;Cuprate(4-), (mu-((6,6'-((3,3'-dihydroxy(1,1'-biphenyl)-4,4'-diyl)bis(azo(4,5-dihydro-3-methyl-5-oxo-1H-pyrazole-4,1-diyl)))bis(1,3-naphthalenedisulfonato))(8-)))di-, tetrasodium;Tetrasodium (mu-((6,6'-((3,3'-dihydroxy(1,1'-biphenyl)-4,4'-diyl)bis(azo(4,5-dihydro-3-methyl-5-oxo-1H-pyrazole-4,1-diyl)))bis(naphthalene-1,3-disulphonato))(8-)))dicuprate(4-);copper(2+) sodium 6,6'-{(3,3'-dioxidobiphenyl-4,4'-diyl)bis[(E)diazene-2,1-diyl(3-methyl-5-oxido-1H-pyrazole-4,1-diyl)]}dinaphthalene-1,3-disulfonate (2:4:1)