(1R,4R)-(S)-2-Amino-N-[4-(benzyl-isopropyl-amino)-cyclohexyl]-propionamide

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

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

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

(S)-2-Amino-1-[4-(benzyl-isopropyl-amino)-piperidin-1-yl]-3-methyl-butan-1-one

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

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

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

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

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

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