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

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

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

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

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

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

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

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

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

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

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