[(R)-1-(2-Chloro-acetyl)-piperidin-3-yl]-cyclopropyl-carbamic acid benzyl ester

[(R)-1-(2-Amino-acetyl)-piperidin-3-yl]-cyclopropyl-carbamic acid benzyl ester

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

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

[1-((S)-2-Amino-propionyl)-piperidin-3-ylmethyl]-carbamic acid benzyl ester

[(S)-1-((S)-2-Amino-propionyl)-piperidin-3-yl]-methyl-carbamic acid benzyl ester

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

[(R)-1-((S)-2-Amino-propionyl)-piperidin-3-yl]-ethyl-carbamic acid benzyl ester

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

[1-((S)-2-Amino-propionyl)-piperidin-3-yl]-isopropyl-carbamic acid benzyl ester

[1-((S)-2-Amino-propionyl)-piperidin-2-ylmethyl]-isopropyl-carbamic acid benzyl ester