ethyl phenylazoacetoacetate, 3-Oxo-2-(phenylazo)butyric acid ethyl ester, Phenyl-azo-acetessigester [German], 2-(PHENYLAZO)ACETOACETIC ACID ETHYL ESTER, 3-oxo-2-phenylhydrazono-butyric acid ethyl ester, EINECS 226-751-6, ethyl 2-phenylhydrazo-3-oxobutyrate, Ethyl 2-(phenylazo)acetoacetate