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

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

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

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

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

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

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

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

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

2-[4-(Benzyl-methyl-amino)-cyclohexylamino]-ethanol

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