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

2-Amino-N-[4-(benzyl-cyclopropyl-amino)-cyclohexyl]-acetamide

(S)-2-Amino-N-[4-(benzyl-isopropyl-amino)-cyclohexyl]-3-methyl-butyramide

(S)-2-Amino-1-{(S)-2-[(benzyl-cyclopropyl-amino)-methyl]-pyrrolidin-1-yl}-3-methyl-butan-1-one

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

4-[(2-Amino-acetyl)-isopropyl-amino]-piperidine-1-carboxylic acid tert-butyl ester

(R)-3-[(2-Amino-acetyl)-cyclopropyl-amino]-pyrrolidine-1-carboxylic acid tert-butyl ester

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

3-[((S)-2-Amino-propionylamino)-methyl]-pyrrolidine-1-carboxylic acid tert-butyl ester

2-[((S)-2-Amino-propionylamino)-methyl]-pyrrolidine-1-carboxylic acid tert-butyl ester

[4-((S)-2-Amino-propionylamino)-cyclohexyl]-carbamic acid tert-butyl ester