N-[1-(2-Amino-acetyl)-piperidin-4-ylmethyl]-acetamide

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

N-[1-((S)-2-Amino-propionyl)-piperidin-4-yl]-N-methyl-acetamide

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

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

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

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

(S)-N-[4-(Acetyl-isopropyl-amino)-cyclohexyl]-2-amino-propionamide

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

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

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