(S)-2-Amino-1-[(R)-3-(benzyl-methyl-amino)-piperidin-1-yl]-3-methyl-butan-1-one

(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

N-[1-(2-Hydroxy-ethyl)-piperidin-4-yl]-acetamide

N-[1-(2-Hydroxy-ethyl)-piperidin-4-ylmethyl]-acetamide

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

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