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

[(S)-2-(Acetylamino-methyl)-pyrrolidin-1-yl]-acetic acid

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

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

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

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

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

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

{4-[(Acetyl-ethyl-amino)-methyl]-piperidin-1-yl}-acetic acid

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

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