(S)-2-Amino-1-{3-[(benzyl-isopropyl-amino)-methyl]-pyrrolidin-1-yl}-3-methyl-butan-1-one

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

[3-(Benzyl-ethyl-amino)-pyrrolidin-1-yl]-acetic acid

[(R)-3-(Benzyl-ethyl-amino)-pyrrolidin-1-yl]-acetic acid

{4-[(Benzyl-ethyl-amino)-methyl]-piperidin-1-yl}-acetic acid

[(S)-3-(Benzyl-isopropyl-amino)-pyrrolidin-1-yl]-acetic acid

{2-[(Benzyl-isopropyl-amino)-methyl]-piperidin-1-yl}-acetic acid

[3-(Benzyl-cyclopropyl-amino)-pyrrolidin-1-yl]-acetic acid

{(S)-2-[(Benzyl-cyclopropyl-amino)-methyl]-pyrrolidin-1-yl}-acetic acid

[2-(Benzyl-cyclopropyl-amino)-cyclohexylamino]-acetic acid

N-[1-(2-Hydroxy-ethyl)-pyrrolidin-2-ylmethyl]-acetamide