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

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

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

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

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

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

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

4-[(2-Amino-ethyl)-isopropyl-amino]-piperidine-1-carboxylic acid benzyl ester

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

1-((S)-2-Amino-propionyl)-piperidin-4-one

1-((S)-2-Amino-3-methyl-butyryl)-piperidin-3-one