(1R,4R)-N-[4-(Acetyl-ethyl-amino)-cyclohexyl]-2-amino-acetamide

N-[1-(2-Amino-acetyl)-piperidin-2-ylmethyl]-N-isopropyl-acetamide

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

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

N-[(S)-1-((S)-2-Amino-propionyl)-piperidin-3-yl]-acetamide

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

N-[1-((S)-2-Amino-propionyl)-piperidin-3-yl]-N-ethyl-acetamide

(S)-N-[2-(Acetyl-ethyl-amino)-cyclohexyl]-2-amino-propionamide

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

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

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