(3-Methoxy-piperidin-1-yl)-acetic acid

1-(2-Chloro-acetyl)-piperidin-3-one

1-(3-Bromo-piperidin-1-yl)-2-chloro-ethanone

1-(4-Bromo-piperidin-1-yl)-2-chloro-ethanone

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

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

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

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

{2-[(2-Amino-acetyl)-methyl-amino]-cyclohexyl}-carbamic acid tert-butyl ester

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

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