(R)-3-(2-Hydroxy-ethylsulfanyl)-piperidine-1-carboxylic acid benzyl ester

2-[(Carboxymethyl-isopropyl-amino)-methyl]-piperidine-1-carboxylic acid tert-butyl ester

2-[(Carboxymethyl-cyclopropyl-amino)-methyl]-pyrrolidine-1-carboxylic acid tert-butyl ester

3-(2-Chloro-acetylamino)-pyrrolidine-1-carboxylic acid tert-butyl ester

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

4-[(2-Chloro-acetylamino)-methyl]-piperidine-1-carboxylic acid tert-butyl ester

(1R,4R)-[4-(2-Chloro-acetylamino)-cyclohexyl]-carbamic acid tert-butyl ester

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

(1R,4R)-{4-[(2-Chloro-acetyl)-methyl-amino]-cyclohexyl}-carbamic acid tert-butyl ester

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

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