68140-36-3 Cuprate(4-), (mu-(5-amino-3-((3,3'-di(hydroxy-kappaO)-4'-((2-(hydroxy-kappaO)-3,6-disulfo-1-naphthalenyl)azo-kappaN1)(1,1'-biphenyl)-4-yl)azo-kappaN1)-4-(hydroxy-kappaO)-2,7-naphthalenedisulfonato(8-)))di-, tetrasodium Cuprate(4-), (mu-(5-amino-3-((3,3'-dihydroxy-4'-((2-hydroxy-3,6-disulfo-1-naphthalenyl)azo)(1,1'-biphenyl)-4-yl)azo)-4-hydroxy-2,7-naphthalenedisulfonato(8-)))di-, tetrasodium