Synonyms: Cuprate(2-),[4-[4,5-dihydro-4-[[4-[[3-[[4,5-dihydro-3-methyl-1-(2-methyl-4-sulfophenyl)-5-(oxo-kO)-1H-pyrazol-4-yl]azo-kN1]-2-hydroxyphenyl]methyl]phenyl]azo]-3-methyl-5-oxo-1H-pyrazol-1-yl]-3-methylbenzenesulfonato(4-)]-,disodium (9CI); Cuprate(2-),[4-[4,5-dihydro-4-[[4-[[3-[[4,5-dihydro-3-methyl-1-(2-methyl-4-sulfophenyl)-5-oxo-1H-pyrazol-4-yl]azo]-2-hydroxyphenyl]methyl]phenyl]azo]-3-methyl-5-oxo-1H-pyrazol-1-yl]-3-methylbenzenesulfonato(4-)]-,disodium; Benzenesulfonic acid,4-[4,5-dihydro-4-[[4-[[3-[[4,5-dihydro-3-methyl-1-(2-methyl-4-sulfophenyl)-5-oxo-1H-pyrazol-4-yl]azo]-2-hydroxyphenyl]methyl]phenyl]azo]-3-methyl-5-oxo-1H-pyrazol-1-yl]-3-methyl-,copper complex