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

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

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

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

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

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

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

2-{3-[(Benzyl-methyl-amino)-methyl]-pyrrolidin-1-yl}-ethanol

2-[(S)-3-(Benzyl-ethyl-amino)-pyrrolidin-1-yl]-ethanol

2-[2-(Benzyl-ethyl-amino)-cyclohexylamino]-ethanol

2-{(S)-2-[(Benzyl-isopropyl-amino)-methyl]-pyrrolidin-1-yl}-ethanol