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

3-{[(2-Chloro-acetyl)-ethyl-amino]-methyl}-pyrrolidine-1-carboxylic acid tert-butyl ester

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

3-[(2-Chloro-acetyl)-isopropyl-amino]-pyrrolidine-1-carboxylic acid tert-butyl ester

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

3-{[(2-Chloro-acetyl)-cyclopropyl-amino]-methyl}-pyrrolidine-1-carboxylic acid tert-butyl ester

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

2-[(2-Chloro-acetylamino)-methyl]-pyrrolidine-1-carboxylic acid benzyl ester

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

(S)-3-[(2-Chloro-acetyl)-methyl-amino]-pyrrolidine-1-carboxylic acid benzyl ester

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