[1-(2-Chloro-acetyl)-piperidin-3-ylmethyl]-cyclopropyl-carbamic acid tert-butyl ester

[1-(2-Amino-acetyl)-piperidin-3-yl]-carbamic acid tert-butyl ester

[1-(2-Amino-acetyl)-piperidin-2-ylmethyl]-methyl-carbamic acid tert-butyl ester

[(S)-1-(2-Amino-acetyl)-pyrrolidin-3-yl]-ethyl-carbamic acid tert-butyl ester

[1-(2-Amino-acetyl)-piperidin-3-yl]-ethyl-carbamic acid tert-butyl ester

[1-(2-Amino-acetyl)-piperidin-3-ylmethyl]-isopropyl-carbamic acid tert-butyl ester

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

[1-((S)-2-Amino-propionyl)-pyrrolidin-3-yl]-carbamic acid tert-butyl ester

[1-((S)-2-Amino-propionyl)-piperidin-2-ylmethyl]-carbamic acid tert-butyl ester

[1-((S)-2-Amino-propionyl)-piperidin-2-ylmethyl]-methyl-carbamic acid tert-butyl ester

[1-((S)-2-Amino-propionyl)-piperidin-4-yl]-ethyl-carbamic acid tert-butyl ester