(S)-3-(Carboxymethyl-amino)-pyrrolidine-1-carboxylic acid tert-butyl ester

(R)-3-(Carboxymethyl-isopropyl-amino)-piperidine-1-carboxylic acid tert-butyl ester

(1R,4R)-[(4-tert-Butoxycarbonylamino-cyclohexyl)-isopropyl-amino]-acetic acid

(S)-3-(Carboxymethyl-cyclopropyl-amino)-piperidine-1-carboxylic acid tert-butyl ester

4-(Carboxymethyl-cyclopropyl-amino)-piperidine-1-carboxylic acid tert-butyl ester

[4-(2-Chloro-acetylamino)-cyclohexyl]-carbamic acid tert-butyl ester

[2-(2-Chloro-acetylamino)-cyclohexyl]-carbamic acid tert-butyl ester

2-[(2-Chloro-acetylamino)-methyl]-piperidine-1-carboxylic acid tert-butyl ester

{4-[(2-Chloro-acetyl)-methyl-amino]-cyclohexyl}-carbamic acid tert-butyl ester

(S)-2-{[(2-Chloro-acetyl)-ethyl-amino]-methyl}-pyrrolidine-1-carboxylic acid tert-butyl ester

3-[(2-Chloro-acetyl)-ethyl-amino]-piperidine-1-carboxylic acid tert-butyl ester