2-((m-Chlorophenyl)azo)-3-oxobutyric acid ethyl ester 3-Chlor-phenyl-azo-acetessigester [German] 5869-59-0 ACETOACETIC ACID, 2-((m-CHLOROPHENYL)AZO)-, ETHYL ESTER BRN 4485443 Butanoic acid, 2-((3-chlorophenyl)azo)-3-oxo-, ethyl ester