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

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

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

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

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

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

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

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

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

[1-(2-Hydroxy-ethyl)-piperidin-2-ylmethyl]-carbamic acid benzyl ester

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