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

[1-((S)-2-Amino-3-methyl-butyryl)-piperidin-4-yl]-cyclopropyl-carbamic acid benzyl ester

[3-(Benzyloxycarbonylamino-methyl)-pyrrolidin-1-yl]-acetic acid

[2-(Benzyloxycarbonylamino-methyl)-piperidin-1-yl]-acetic acid

[4-(Benzyloxycarbonylamino-methyl)-piperidin-1-yl]-acetic acid

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

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

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

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

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

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