Synonyms: 2-(2-(2-Chloro-1,1,2-trifluoroethoxy)phenyl)-5-((4-(hexadecylsulphonyl)phenyl)amino)-2,4-dihydro-4-((4-hydroxyphenyl)azo)-3H-pyrazol-3-one;2-[2-(2-chloro-1,1,2-trifluoroethoxy)phenyl]-5-{[4-(hexadecylsulfonyl)phenyl]amino}-4-[2-(4-oxocyclohexa-2,5-dien-1-ylidene)hydrazino]-2,4-dihydro-3H-pyrazol-3-one