(1R,4R)-[4-(tert-Butoxycarbonyl-ethyl-amino)-cyclohexylamino]-acetic acid

[3-(tert-Butoxycarbonyl-cyclopropyl-amino)-pyrrolidin-1-yl]-acetic acid

[4-(tert-Butoxycarbonyl-cyclopropyl-amino)-cyclohexylamino]-acetic acid

[2-(tert-Butoxycarbonyl-cyclopropyl-amino)-cyclohexylamino]-acetic acid

[(S)-1-(2-Hydroxy-ethyl)-pyrrolidin-3-yl]-methyl-carbamic acid benzyl ester

[4-(2-Hydroxy-ethylamino)-cyclohexyl]-methyl-carbamic acid benzyl ester

Ethyl-[1-(2-hydroxy-ethyl)-piperidin-4-yl]-carbamic acid benzyl ester

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

[1-(2-Hydroxy-ethyl)-piperidin-4-yl]-isopropyl-carbamic acid benzyl ester

Cyclopropyl-[(S)-1-(2-hydroxy-ethyl)-piperidin-3-yl]-carbamic acid benzyl ester

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