(1R,4R)-(S)-2-Amino-N-[4-(benzyl-ethyl-amino)-cyclohexyl]-3-methyl-butyramide

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

[2-(Benzyl-ethyl-amino)-cyclohexylamino]-acetic acid

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

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

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

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

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

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

N-Ethyl-N-[2-(2-hydroxy-ethylamino)-cyclohexyl]-acetamide

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