3-(2-Amino-ethylsulfanyl)-piperidine-1-carboxylic acid benzyl ester

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

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

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

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

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

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

4-(Carboxymethyl-cyclopropyl-amino)-piperidine-1-carboxylic acid tert-butyl ester

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

(R)-3-(2-Chloro-acetylamino)-pyrrolidine-1-carboxylic acid tert-butyl ester

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