(1-Methyl-piperidin-3-ylamino)-acetic acid

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

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

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

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

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

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

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

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

((R)-3-Hydroxy-pyrrolidin-1-yl)-acetic acid

(3-Hydroxymethyl-pyrrolidin-1-yl)-acetic acid