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

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

[4-(2-Chloro-acetylamino)-cyclohexyl]-carbamic acid benzyl ester

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

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

2-[(2-Chloro-acetyl)-ethyl-amino]-cyclohexyl}-carbamic acid benzyl ester

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

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

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

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

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