(1R,4R)-(S)-N-[4-(Acetyl-cyclopropyl-amino)-cyclohexyl]-2-amino-propionamide

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

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

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

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

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

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

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

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

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

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