[(R)-1-((S)-2-Amino-3-methyl-butyryl)-piperidin-3-yl]-ethyl-carbamic acid tert-butyl ester

((S)-3-tert-Butoxycarbonylamino-piperidin-1-yl)-acetic acid

{3-[(tert-Butoxycarbonyl-methyl-amino)-methyl]-piperidin-1-yl}-acetic acid

{3-[(tert-Butoxycarbonyl-ethyl-amino)-methyl]-piperidin-1-yl}-acetic acid

{2-[(tert-Butoxycarbonyl-ethyl-amino)-methyl]-piperidin-1-yl}-acetic acid

[4-(tert-Butoxycarbonyl-isopropyl-amino)-piperidin-1-yl]-acetic acid

{2-[(tert-Butoxycarbonyl-cyclopropyl-amino)-methyl]-piperidin-1-yl}-acetic acid

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

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

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

Ethyl-[1-(2-hydroxy-ethyl)-pyrrolidin-3-ylmethyl]-carbamic acid benzyl ester