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Methyl 1-(methylsulfonyl)-3-azetidinecarboxylate

Tert-butyl n-cbz-4-aminobutanoate

Methyl 4-(cbz-amino)tetrahydropyran-4-carboxylate

Ethyl 4-(4-methyl-1-piperazinyl)butanoate

Ethyl 3-methyl-2-oxo-3-butenoate

Ethyl 2-(4-acetylphenyl)acetate

Methyl 2,6-dichloro-3-(methylamino)isonicotinate

Ethyl 2-cyano-3-phenylpropanoate

1-(3,5-Dichlorophenyl)-3-(ethoxycarbonyl)urea

Methyl 4,4-dimethyl-2-oxopyrrolidine-3-carboxylate