Synonyms:
2-[(2-nitrophenyl)azo]-3-oxo-n-phenyl-butanamide ; butanamide, 2-(2-nitrophenyl)azo-3-oxo-n-phenyl- ; 2-(2-nitrophenyl)diazenyl-3-oxo-n-phenylbutanamide ; c.i. 11660 ; 2-[(o-nitrophenyl)azo]acetoacetanilide ; pigment yellow 5 (c.i. 11660) ; 2-[(2-nitrophenyl)azo]-3-oxo-n-phenyl-butanamid ; c. i. pigment yellow 5 ; pigment yellow 5 ; 3-keto-2-(2-nitrophenyl)azo-n-phenyl-butyramide