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

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

(1R,4R)-(4-Benzyloxycarbonylamino-cyclohexylamino)-acetic acid

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

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

(R)-3-(Carboxymethyl-cyclopropyl-amino)-piperidine-1-carboxylic acid benzyl ester

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

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

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

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

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