1-Naphthalenesulfonic acid, 3-hydroxy-4-((1-(4-(3-(4-(5-hydroxy-3-methylpyrazol-1-yl)phenyl)ureido)phenyl)-5-hydroxy-3-methylpyrazol-4-yl)azo)-7-nitro-,sodium salt 1-Naphthalenesulfonic acid, 4-((1-(4-((((4-(4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)phenyl)amino)carbonyl)amino)phenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl)azo)-3-hydroxy-7-nitro-, monosodium salt 68258-99-1 EINECS 269-502-7 Sodium 4-((1-(4-((((4-(4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)phenyl)amino)carbonyl)amino)phenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl)azo)-3-hydroxy-7-nitronaphthalene-1-sulphonate