2-{[((S)-2-Amino-3-methyl-butyryl)-ethyl-amino]-methyl}-piperidine-1-carboxylic acid tert-butyl ester

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

(S)-3-(Carboxymethyl-ethyl-amino)-piperidine-1-carboxylic acid benzyl ester

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

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

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

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

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

4-[Ethyl-(2-hydroxy-ethyl)-amino]-piperidine-1-carboxylic acid benzyl ester

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

(S)-3-[Cyclopropyl-(2-hydroxy-ethyl)-amino]-pyrrolidine-1-carboxylic acid benzyl ester