(R)-3-(2-Hydroxy-ethylsulfanyl)-piperidine-1-carboxylic acid tert-butyl ester

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

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

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

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

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

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

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

3-[(2-Chloro-acetylamino)-methyl]-pyrrolidine-1-carboxylic acid tert-butyl ester

4-(2-Chloro-acetylamino)-piperidine-1-carboxylic acid tert-butyl ester

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