[4-((S)-2-Amino-3-methyl-butyrylamino)-cyclohexyl]-cyclopropyl-carbamic acid tert-butyl ester

[(S)-2-(tert-Butoxycarbonylamino-methyl)-pyrrolidin-1-yl]-acetic acid

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

[(S)-3-(tert-Butoxycarbonyl-ethyl-amino)-piperidin-1-yl]-acetic acid

(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