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Ethyl 4-(benzylamino)butanoate hydrochloride

Ethyl 4-(4-nitrophenyl)piperazine-1-carboxylate

Ethyl 4-(4-formylphenyl)butanoate

Ethyl 4-(4-formyl-2-methoxyphenoxy)butanoate

Ethyl 4-(4-chlorophenyl)-3-methyl-2,4-dioxobutanoate

Ethyl 4-(2-chlorophenyl)-2-methylpyrimidine-5-carboxylate

Ethyl 3-oxo-3-(1h-pyrrol-2-yl)propanoate

Ethyl 3-oxa-bicyclo[3.1.0]hexane-6-carboxylate

Ethyl 3-methylimidazo[2,1-b]thiazole-2-carboxylate

Ethyl 3-methoxyphenethylcarbamate