(S)-2-Amino-1-[(S)-3-(benzyl-ethyl-amino)-piperidin-1-yl]-3-methyl-butan-1-one

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

(S)-2-Amino-N-[4-(benzyl-cyclopropyl-amino)-cyclohexyl]-3-methyl-butyramide

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

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

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

[4-(Benzyl-ethyl-amino)-cyclohexylamino]-acetic acid

{3-[(Benzyl-isopropyl-amino)-methyl]-pyrrolidin-1-yl}-acetic acid

(1R,4R)-[4-(Benzyl-isopropyl-amino)-cyclohexylamino]-acetic acid

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

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