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

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

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

4-(Carboxymethyl-amino)-piperidine-1-carboxylic acid benzyl ester

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

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

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

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

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

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

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