(S)-2-Amino-N-methyl-N-pyrazin-2-ylmethyl-propionamide

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

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

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

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

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

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

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

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

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

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