2-Chloro-N-isopropyl-N-(1-pyrazin-2-yl-ethyl)-acetamide

(S)-2-Amino-N-(3-chloro-pyrazin-2-ylmethyl)-3-methyl-butyramide

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

(S)-2-Amino-N-isopropyl-3-methyl-N-(1-pyrazin-2-yl-ethyl)-butyramide

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

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

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

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

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

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

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