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

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

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

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

[4-(2-Amino-acetylamino)-cyclohexyl]-ethyl-carbamic acid tert-butyl ester

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

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

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

[1-(2-Amino-acetyl)-piperidin-4-yl]-cyclopropyl-carbamic acid tert-butyl ester

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

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

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

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

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

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