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

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

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

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

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

[Ethyl-(1-methyl-piperidin-2-ylmethyl)-amino]-acetic acid

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

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

[Cyclopropyl-((S)-1-methyl-piperidin-3-yl)-amino]-acetic acid

[Cyclopropyl-(1-methyl-piperidin-4-yl)-amino]-acetic acid

((S)-2-Hydroxymethyl-pyrrolidin-1-yl)-acetic acid