3-[(2-Chloro-acetyl)-isopropyl-amino]-pyrrolidine-1-carboxylic acid benzyl ester

2-{[(2-Chloro-acetyl)-cyclopropyl-amino]-methyl}-pyrrolidine-1-carboxylic acid benzyl ester

(S)-3-(2-Amino-acetylamino)-pyrrolidine-1-carboxylic acid benzyl ester

(S)-3-[(2-Amino-acetyl)-methyl-amino]-pyrrolidine-1-carboxylic acid benzyl ester

(S)-3-[(2-Amino-acetyl)-methyl-amino]-piperidine-1-carboxylic acid benzyl ester

3-[(2-Amino-acetyl)-ethyl-amino]-piperidine-1-carboxylic acid benzyl ester

{2-[(2-Amino-acetyl)-ethyl-amino]-cyclohexyl}-carbamic acid benzyl ester

3-{[(2-Amino-acetyl)-isopropyl-amino]-methyl}-piperidine-1-carboxylic acid benzyl ester

3-[(2-Amino-acetyl)-cyclopropyl-amino]-piperidine-1-carboxylic acid benzyl ester

2-[((S)-2-Amino-propionylamino)-methyl]-pyrrolidine-1-carboxylic acid benzyl ester

(1R,4R)-[4-((S)-2-Amino-propionylamino)-cyclohexyl]-carbamic acid benzyl ester