N-[1-((S)-2-Amino-propionyl)-piperidin-2-ylmethyl]-N-cyclopropyl-acetamide

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

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

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

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

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

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

(4-Acetylamino-piperidin-1-yl)-acetic acid

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

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

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