sodium 4-chloro-3-[4-[[2-[(2-chlorophenoxy)sulphonyl]phenyl]azo]-2,5-dihydro-5-imino-3-methyl-1H-pyrazol-1-yl]benzenesulphonate
sodium 4-chloro-3-[4-[[2-[(2-chlorophenoxy)sulphonyl]phenyl]azo]-2,5-dihydro-5-imino-3-methyl-1H-pyrazol-1-yl]benzenesulphonate