(S)-2-Amino-N-methyl-N-(2-oxo-2-pyrazin-2-yl-ethyl)-propionamide

(S)-2-Amino-N-(6-chloro-pyridazin-3-ylmethyl)-propionamide

[(Pyrazin-2-ylmethyl)-amino]-acetic acid

[(3-Methylsulfanyl-pyrazin-2-ylmethyl)-amino]-acetic acid

[(3-Methoxy-pyrazin-2-ylmethyl)-amino]-acetic acid

(2-Oxo-2-pyrazin-2-yl-ethylamino)-acetic acid

[Isopropyl-(2-oxo-2-pyrazin-2-yl-ethyl)-amino]-acetic acid

[Cyclopropyl-(6-methoxy-pyridazin-3-ylmethyl)-amino]-acetic acid

2-[(2-Hydroxy-ethyl)-methyl-amino]-1-thiophen-2-yl-ethanone

2-(2-Hydroxy-ethylamino)-1-thiazol-2-yl-ethanone

N*1*-Methyl-N*1*-(1-thiazol-2-yl-ethyl)-ethane-1,2-diamine