2-Chloro-N-(3-chloro-pyrazin-2-ylmethyl)-N-cyclopropyl-acetamide

(S)-2-Amino-N-(3-chloro-pyrazin-2-ylmethyl)-N-isopropyl-propionamide

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

(S)-2-Amino-3,N-dimethyl-N-(2-oxo-2-pyrazin-2-yl-ethyl)-butyramide

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

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

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

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

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

[(6-Chloro-pyridazin-3-ylmethyl)-isopropyl-amino]-acetic acid

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