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

[4-(2-Amino-ethylsulfanyl)-cyclohexyl]-carbamic acid benzyl ester

(1R,4R)-(4-tert-Butoxycarbonylamino-cyclohexylamino)-acetic acid

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

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

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

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

4-[(Carboxymethyl-isopropyl-amino)-methyl]-piperidine-1-carboxylic acid tert-butyl este

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

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

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

(1R,4R)-[4-(2-Chloro-acetylamino)-cyclohexyl]-carbamic acid tert-butyl ester

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

4-{[(2-Chloro-acetyl)-methyl-amino]-methyl}-piperidine-1-carboxylic acid tert-butyl ester

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