N-[1-((S)-2-Amino-3-methyl-butyryl)-piperidin-4-ylmethyl]-N-methyl-aceamide

(3-Acetylamino-pyrrolidin-1-yl)-acetic acid

[(S)-3-(Acetyl-methyl-amino)-pyrrolidin-1-yl]-acetic acid

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

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

[2-(Acetyl-methyl-amino)-cyclohexylamino]-acetic acid

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

{2-[(Acetyl-isopropyl-amino)-methyl]-pyrrolidin-1-yl}-acetic acid

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

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

[4-(Acetyl-cyclopropyl-amino)-cyclohexylamino]-acetic acid