[Methyl-(1-methyl-piperidin-4-ylmethyl)-amino]-acetic acid

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

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

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

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

(1R,4R)-[(4-Dimethylamino-cyclohexyl)-isopropyl-amino]-acetic acid

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

[Cyclopropyl-(2-dimethylamino-cyclohexyl)-amino]-acetic acid

(2-Hydroxymethyl-piperidin-1-yl)-acetic acid

(4-Hydroxy-cyclohexylamino)-acetic acid