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

[1-(2-Amino-ethyl)-piperidin-4-yl]-cyclopropyl-carbamic acid benzyl ester

[(S)-1-(2-Chloro-acetyl)-pyrrolidin-3-yl]-carbamic acid benzyl ester

2-Amino-1-[(S)-3-(benzyl-cyclopropyl-amino)-pyrrolidin-1-yl]-ethanone

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

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

(S)-2-Amino-1-[(R)-3-(benzyl-cyclopropyl-amino)-piperidin-1-yl]-3-methyl-butan-1-one

(S)-2-Amino-1-[4-(benzyl-cyclopropyl-amino)-piperidin-1-yl]-3-methyl-butan-1-one

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

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

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