3-(2-Hydroxy-ethylsulfanylmethyl)-pyrrolidine-1-carboxylic acid tert-butyl ester

(S)-3-(Carboxymethyl-amino)-piperidine-1-carboxylic acid tert-butyl ester

4-(2-Amino-ethylsulfanyl)-piperidine-1-carboxylic acid benzyl ester

(R)-3-(Carboxymethyl-amino)-pyrrolidine-1-carboxylic acid tert-butyl ester

3-[(Carboxymethyl-amino)-methyl]-pyrrolidine-1-carboxylic acid tert-butyl ester

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

(1R,4R)-[(4-tert-Butoxycarbonylamino-cyclohexyl)-methyl-amino]-acetic acid

(S)-3-(Carboxymethyl-ethyl-amino)-pyrrolidine-1-carboxylic acid tert-butyl ester

3-(Carboxymethyl-ethyl-amino)-piperidine-1-carboxylic acid tert-butyl ester

3-(Carboxymethyl-isopropyl-amino)-pyrrolidine-1-carboxylic acid tert-butyl ester

3-(Carboxymethyl-isopropyl-amino)-piperidine-1-carboxylic acid tert-butyl ester