[(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

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

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

1-{2-[(2-Hydroxy-ethylamino)-methyl]-piperidin-1-yl}-ethanone

1-{(S)-3-[(2-Hydroxy-ethyl)-methyl-amino]-piperidin-1-yl}-ethanone