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

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

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

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

N-[1-((S)-2-Amino-3,3-dimethyl-butyryl)-pyrrolidin-2-ylmethyl]-N-isopropyl-acetamide

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

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

((S)-3-Acetylamino-pyrrolidin-1-yl)-acetic acid

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

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

[2-(Acetyl-methyl-amino)-cyclohexylamino]-acetic acid