(S)-2-Amino-1-[(S)-3-(benzyl-cyclopropyl-amino)-piperidin-1-yl]-propan-1-one

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

[4-(Benzyl-methyl-amino)-cyclohexylamino]-acetic acid

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

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

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

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

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

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

[(S)-3-(Benzyl-cyclopropyl-amino)-piperidin-1-yl]-acetic acid

N-[1-(2-Hydroxy-ethyl)-piperidin-3-yl]-acetamide