3-((S)-2-Amino-3-methyl-butyrylamino)-pyrrolidine-1-carboxylic acid tert-butyl ester

[(4-Benzyloxycarbonylamino-cyclohexyl)-ethyl-amino]-acetic acid

3-(Carboxymethyl-isopropyl-amino)-pyrrolidine-1-carboxylic acid benzyl ester

[(4-Benzyloxycarbonylamino-cyclohexyl)-isopropyl-amino]-acetic acid

[(2-Benzyloxycarbonylamino-cyclohexyl)-isopropyl-amino]-acetic acid

2-[(Carboxymethyl-cyclopropyl-amino)-methyl]-piperidine-1-carboxylic acid benzyl ester

(R)-3-[(2-Hydroxy-ethyl)-methyl-amino]-piperidine-1-carboxylic acid benzyl ester

(R)-3-[(2-Hydroxy-ethyl)-methyl-amino]-pyrrolidine-1-carboxylic acid benzyl ester

2-{[(2-Hydroxy-ethyl)-methyl-amino]-methyl}-piperidine-1-carboxylic acid benzyl ester

2-{[Ethyl-(2-hydroxy-ethyl)-amino]-methyl}-pyrrolidine-1-carboxylic acid benzyl ester

{4-[Ethyl-(2-hydroxy-ethyl)-amino]-cyclohexyl}-carbamic acid benzyl ester