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

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

N-[1-((S)-2-Amino-propionyl)-piperidin-4-ylmethyl]-N-cyclopropyl-acetamide

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

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

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

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

(1R,4R)-(S)-N-[4-(Acetyl-ethyl-amino)-cyclohexyl]-2-amino-3-methyl-butyramide

(S)-N-[4-(Acetyl-isopropyl-amino)-cyclohexyl]-2-amino-3-methyl-butyramide

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

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