Synonyms: Cobaltate(4-), (3-((4-chloro-6-((2-hydroxyethyl)amino)-1,3,5-triazin-2-yl)amino)-5-((4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl)azo)-4-hydroxybenzenesulfonato(3-))(4-((6-((4-chloro-6-((2-hydroxyethyl)amino)-1,3,5-triazin-2-yl)amino)-1-hydroxy-3-sulfo-2-naphthalenyl)azo)-3-hydroxy-7-nitro-1-naphthalenesulfonato(4-))-, tetrasodium