(S)-2-Amino-N-(1-benzyl-piperidin-2-ylmethyl)-N-ethyl-propionamide

(S)-2-Amino-N-(1-benzyl-piperidin-3-ylmethyl)-N-isopropyl-3-methyl-butyramide

(S)-2-Amino-N-(1-benzyl-pyrrolidin-2-ylmethyl)-N-cyclopropyl-3-methyl-butyramide

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

(1-Acetyl-piperidin-4-ylamino)-acetic acid

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

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

[(1-Acetyl-piperidin-4-ylmethyl)-ethyl-amino]-acetic acid

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

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

1-{(S)-2-[(2-Hydroxy-ethylamino)-methyl]-pyrrolidin-1-yl}-ethanone