(S)-2-Amino-N-((S)-1-benzyl-piperidin-3-yl)-N-ethyl-3-methyl-butyramide

((S)-1-Acetyl-pyrrolidin-3-ylamino)-acetic acid

(1R,4R)- (4-Acetylamino-cyclohexylamino)-acetic acid

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

[(4-Acetylamino-cyclohexyl)-methyl-amino]-acetic acid

[(1-Acetyl-pyrrolidin-3-ylmethyl)-ethyl-amino]-acetic acid

[(1-Acetyl-piperidin-4-yl)-ethyl-amino]-acetic acid

[(1-Acetyl-piperidin-4-ylmethyl)-ethyl-amino]-acetic acid

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

[((S)-1-Acetyl-piperidin-3-yl)-isopropyl-amino]-acetic acid

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