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

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

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

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

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

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

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

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

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

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

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