2-(3-Chlorophenyl)-2,4-dihydro-4-[[2-hydroxy-5-(methylsulfonyl)phenyl]azo]-5-methyl-3H-pyrazol-3-one

2-(3-chlorophenyl)-2,4-dihydro-4-[[2-hydroxy-5-(methylsulphonyl)phenyl]azo]-5-methyl-3H-pyrazol-3-one