(S)-2-Amino-1-[(S)-3-(benzyl-isopropyl-amino)-pyrrolidin-1-yl]-propan-1-one

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

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

(1R,4R)-(S)-2-Amino-N-[4-(benzyl-ethyl-amino)-cyclohexyl]-3-methyl-butyramide

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

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

(1R,4R)-(S)-2-Amino-N-[4-(benzyl-cyclopropyl-amino)-cyclohexyl]-3-methyl-butyramide

[(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