4-[2-(3-bromo-4-ethoxybenzoyl)hydrazinyl]-4-oxo-N-phenylbutanamide;4-[N'-(3-bromo-4-ethoxy-benzoyl)hydrazino]-4-oxo-N-phenyl-butanamide;4-[N'-[(3-bromo-4-ethoxyphenyl)-oxomethyl]hydrazino]-4-oxo-N-phenylbutanamide;4-[N'-(3-bromo-4-ethoxy-benzoyl)hydrazino]-4-keto-N-phenyl-butyramide;4-[2-(3-bromo-4-ethoxy-phenyl)carbonylhydrazinyl]-4-oxo-N-phenyl-butanamide
4-[2-(3-bromo-4-ethoxybenzoyl)hydrazinyl]-4-oxo-N-phenylbutanamide