Ethyl 4-amino-3, 5-dichlorobenzoate

Ethyl 4-amino-3-bromo-5-nitrobenzoate

Ethyl 4-amino-5-cyanosalicylate

Ethyl 4-aminocinnamate

Ethyl 4-aminocinnamate hydrochloride

Ethyl 4-aminocinnamate, (Z)-

Ethyl 4-aminopiperidine-1-carboxylate monohydrochloride

Ethyl 4-azidobenzoylaminoacetimidate

Ethyl 4-azidophenyl-1, 4-dithiobutyrimidate

Ethyl 4-benzyloxybenzoate

Ethyl 4-bromo-1-((4-methylphenyl)sulfonyl)-5-oxo-2, 3, 4, 5-tetrahydro-1H-1-benzazepine-4-carboxylate

Ethyl 4-bromobenzoate

Ethyl 4-bromobutyrate

Ethyl 4-bromocrotonate

Ethyl 4-butylaminobenzoate

Ethyl 4-carbamoyl-4-((4-fluorophenyl)amino)piperidine-1-carboxylate

Ethyl 4-carbamoyl-4-(phenylamino)piperidine-1-carboxylate

Ethyl 4-chloro-2-(4-(fluorosulphonyl)phenyl)quinoline-6-carboxylate

Ethyl 4-chloro-2-(hydroxyimino)-3-oxobutyrate

Ethyl 4-chloro-2-(methoxyimino)-3-oxobutyrate