3-Oxo-2-(phenylazo)butyric acid ethyl ester 5462-33-9 ACETOACETIC ACID, 2-(PHENYLAZO)-, ETHYL ESTER BRN 0659093 Butanoic acid, 3-oxo-2-(phenylazo)-, ethyl ester (9CI) EINECS 226-751-6 Ethyl 2-(phenylazo)acetoacetate Ethyl 2-phenylazoacetoacetate NSC 17512 Phenyl-azo-acetessigester [German]