(S)-2-Amino-1-[4-(benzyl-cyclopropyl-amino)-piperidin-1-yl]-propan-1-one

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

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

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

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

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

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

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

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

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

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