N-[(S)-1-((S)-2-Amino-3-methyl-butyryl)-pyrrolidin-3-yl]-N-cyclopropyl-acetamide

((S)-3-Acetylamino-piperidin-1-yl)-acetic acid

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

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

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

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

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

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

2-((S)-2-Dimethylaminomethyl-pyrrolidin-1-yl)-ethanol

2-{3-[(Isopropyl-methyl-amino)-methyl]-piperidin-1-yl}-ethanol

4-(2-Amino-acetyl)-piperazine-1-carboxylic acid benzyl ester