(S)-2-Amino-N-((S)-1-benzyl-piperidin-3-yl)-N-cyclopropyl-propionamide

(S)-2-Amino-N-((R)-1-benzyl-piperidin-3-yl)-N-cyclopropyl-3-methyl-butyramide

[(1-Acetyl-piperidin-2-ylmethyl)-amino]-acetic acid

2-[{(1-Acetyl-pyrrolidin-3-yl)methyl}amino]acetic acid

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

[(1-Acetyl-piperidin-4-yl)-ethyl-amino]-acetic acid

[((S)-1-Acetyl-pyrrolidin-2-ylmethyl)-isopropyl-amino]-acetic acid

[(1-Acetyl-piperidin-4-yl)-isopropyl-amino]-acetic acid

[(1-Acetyl-piperidin-3-ylmethyl)-isopropyl-amino]-acetic acid

1-[(R)-3-(2-Hydroxy-ethylamino)-piperidin-1-yl]-ethanone

1-{3-[(2-Hydroxy-ethyl)-methyl-amino]-pyrrolidin-1-yl}-ethanone