Ethyl N-(3-methoxy-2-methyl-3-oxopropyl)-N-(phenylmethyl)-beta-alaninate

Ethyl N-(4-chlorophenyl)-2-oxoglycinate

Ethyl N-(4-methyl-1, 3-oxazol-5-yl)-n-propylcarbamate

Ethyl N-(4-tolylsulfonyl)-1-pyrrolidinecarboximidate

Ethyl N-(5-chloro-1, 2-benzothiazol-3-yl)carbamate

Ethyl N-(5-chloro-2-methylphenyl)carbamate

Ethyl N-(5-methyl-1, 2-benzothiazol-3-yl)carbamate

Ethyl N-(5-nitro-1, 2-benzothiazol-3-yl)carbamate

Ethyl N-(7-nitro-1, 2-benzothiazol-3-yl)carbamate

Ethyl N-(9, 10-dihydro-4-hydroxy-9, 10-dioxo-1-anthryl)-beta-alaninate

Ethyl N-(benzoyloxy)laurimidate

Ethyl N-(ethoxycarbonyl)-N-(3-ethoxy-3-oxopropyl)-beta-alaninate

Ethyl N-(L-aspartyl)-1-aminocyclopropanecarboxylate

Ethyl N-(methylethoxythiophosphorylmercapto)acetylglycine

Ethyl N-(N-formyl-3-phenyl-L-alanyl)-3-phenyl-L-alaninate

Ethyl N-(N2-(3-(bis(2-chloroethyl)amino)-3-phenyl-L-alanyl)-N5-(imino(nitroamino)methyl)-L-ornithyl)-L-norvalinate monohydrobromide

Ethyl N-(O-4-deacetyl-vinblastin-23-oyl)-L-tryptophanate

Ethyl N-(phenylmethyl)glycinate

Ethyl N-5-azido-2-nitrobenzoylaminoacetimidate

Ethyl N-acetyl-N-phenylglycinate