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

[(R)-3-(Benzyloxycarbonyl-methyl-amino)-piperidin-1-yl]-acetic acid

{4-[(Benzyloxycarbonyl-methyl-amino)-methyl]-piperidin-1-yl}-acetic acid

{(S)-2-[(Benzyloxycarbonyl-ethyl-amino)-methyl]-pyrrolidin-1-yl}-acetic acid

{3-[(Benzyloxycarbonyl-ethyl-amino)-methyl]-pyrrolidin-1-yl}-acetic acid

[(S)-3-(Benzyloxycarbonyl-isopropyl-amino)-pyrrolidin-1-yl]-acetic acid

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

[4-(Benzyloxycarbonyl-isopropyl-amino)-cyclohexylamino]-acetic acid

[(S)-3-(Benzyloxycarbonyl-cyclopropyl-amino)-pyrrolidin-1-yl]-acetic acid

(1R,4R)-[4-(Benzyloxycarbonyl-cyclopropyl-amino)-cyclohexylamino]-acetic acid

[2-(Benzyloxycarbonyl-cyclopropyl-amino)-cyclohexylamino]-acetic acid