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

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

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

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

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

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

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

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

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

(1R,4R)-[4-(Acetyl-cyclopropyl-amino)-cyclohexylamino]-acetic acid

2-(3-Dimethylamino-pyrrolidin-1-yl)-ethanol