[((S)-1-Acetyl-pyrrolidin-2-ylmethyl)-methyl-amino]-acetic acid

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

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

[(2-Acetylamino-cyclohexyl)-ethyl-amino]-acetic acid

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

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

[(2-Acetylamino-cyclohexyl)-isopropyl-amino]-acetic acid

1-[3-(2-Hydroxy-ethylamino)-pyrrolidin-1-yl]-ethanone

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

1-[(S)-3-(2-Hydroxy-ethylamino)-piperidin-1-yl]-ethanone

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