N-[1-((S)-2-Amino-3-methyl-butyryl)-piperidin-2-ylmethyl]-acetamide

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

(S)-N-[4-(Acetyl-isopropyl-amino)-cyclohexyl]-2-amino-3-methyl-butyramide

N-[(S)-1-((S)-2-Amino-3-methyl-butyryl)-piperidin-3-yl]-N-cyclopropyl-acetamide

((R)-3-Acetylamino-piperidin-1-yl)-acetic acid

[4-(Acetylamino-methyl)-piperidin-1-yl]-acetic acid

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

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

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

{3-[(Acetyl-isopropyl-amino)-methyl]-piperidin-1-yl}-acetic acid

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