N-[(R)-1-((S)-2-Amino-3-methyl-butyryl)-pyrrolidin-3-yl]-N-ethyl-acetamide

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

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

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

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

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

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

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

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

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

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