Synonyms: Aceticacid, phenoxy-, 2-[N-ethyl-p-[[2-(methylsulfonyl)-4-nitrophenyl]azo]anilino]ethylester (7CI,8CI); Acetic acid, phenoxy-,2-[ethyl[4-[[2-(methylsulfonyl)-4-nitrophenyl]azo]phenyl]amino]ethyl ester(9CI); Ethanol, 2-[N-ethyl-p-[[2-(methylsulfonyl)-4-nitrophenyl]azo]anilino]-,phenoxyacetate (ester) (8CI);2-[Ethyl[4-[[2-(methylsulfonyl)-4-nitrophenyl]azo]phenyl]amino]ethylphenoxyacetate