1-(4-{[(2-Amino-ethyl)-ethyl-amino]-methyl}-piperidin-1-yl)-ethanone

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

1-{(R)-3-[(2-Amino-ethyl)-isopropyl-amino]-piperidin-1-yl}-ethanone

1-(2-{[(2-Amino-ethyl)-cyclopropyl-amino]-methyl}-piperidin-1-yl)-ethanone

(4-Dimethylamino-cyclohexylamino)-acetic acid

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

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

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

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

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