1-[2-(2-Hydroxy-ethoxymethyl)-piperidin-1-yl]-ethanone

2-Amino-1-(3-chloro-pyrrolidin-1-yl)-ethanone

2-[(2-Amino-acetylamino)-methyl]-pyrrolidine-1-carboxylic acid tert-butyl ester

2-[(2-Amino-acetylamino)-methyl]-piperidine-1-carboxylic acid tert-butyl ester

(1R,4R)-[4-(2-Amino-acetylamino)-cyclohexyl]-carbamic acid tert-butyl ester

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

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

{4-[(2-Amino-acetyl)-ethyl-amino]-cyclohexyl}-carbamic acid tert-butylester

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

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

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