2-Chloro-N-(2-oxo-2-pyrazin-2-yl-ethyl)-acetamide

2-Amino-N-cyclopropyl-N-(1-pyrazin-2-yl-ethyl)-acetamide

2-Chloro-N-(6-methoxy-pyridazin-3-ylmethyl)-acetamide

2-Amino-N-cyclopropyl-N-(6-methoxy-pyridazin-3-ylmethyl)-acetamide

(S)-2-Amino-N-(3-methylsulfanyl-pyrazin-2-ylmethyl)-propionamide

(S)-2-Amino-N-(3-methoxy-pyrazin-2-ylmethyl)-3,N-dimethyl-butyramide

(S)-2-Amino-N-cyclopropyl-N-(1-pyrazin-2-yl-ethyl)-propionamide

(S)-2-Amino-N-cyclopropyl-3-methyl-N-(2-oxo-2-pyrazin-2-yl-ethyl)-butyramide

(Cyclopropyl-pyrazin-2-ylmethyl-amino)-acetic acid

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

[Isopropyl-(1-pyrazin-2-yl-ethyl)-amino]-acetic acid