(3,5-dichloro-6-methyl-2-oxo-2H-pyrazin-1-yl)acetic acid benzyl ester

(4-{4-[(3-Amino-phenylcarbamoyl)-methyl]-6-chloro-5-methyl-3-oxo-3,4-dihydro-pyrazin-2-ylamino}-cyclohexyl)-carbamic acid tert-butyl ester

[5-Chloro-3-(4-fluoro-phenylamino)-6-methyl-2-oxo-2H-pyrazin-1-yl]-acetic acid

(4-{4-[(4-Amino-phenylcarbamoyl)-methyl]-6-chloro-5-methyl-3-oxo-3,4-dihydro-pyrazin-2-ylamino}-cyclohexyl)-carbamic acid tert-butyl ester

[5-Chloro-3-(3-chloro-phenylamino)-6-methyl-2-oxo-2H-pyrazin-1-yl]-acetic acid

N-(6-Amino-pyridin-3-ylmethyl)-2-(6-methyl-2-oxo-3-phenethylamino-2H-pyrazin-1-yl)-acetamide

[5-Chloro-3-(indan-2-ylamino)-6-methyl-2-oxo-2H-pyrazin-1-yl]-acetic acid

3-(4-methoxybenzylamino)-6-methyl-1-carboxymethylpyrazinone

{5-Chloro-3-[4-(5-fluoro-benzoimidazol-1-yl)-piperidin-1-yl]-6-methyl-2-oxo-2H-pyrazin-1-yl}-acetic acid

2-[6-methyl-2-oxo-3-(2-phenylethylamino)pyrazin-1-yl]acetic acid

[3-(2-{5-Chloro-3-[4-(5-fluoro-benzoimidazol-1-yl)-piperidin-1-yl]-6-methyl-2-oxo-2H-pyrazin-1-yl}-acetylamino)-benzyl]-carbamic acid tert-butyl ester

(3-{2-[5-Chloro-3-(4-methoxy-benzylamino)-6-methyl-2-oxo-2H-pyrazin-1-yl]-acetylamino}-benzyl)-carbamic acid tert-butyl ester

[5-Chloro-6-methyl-3-((S)-1-methyl-2-phenyl-ethylamino)-2-oxo-2H-pyrazin-1-yl]-acetic acid

(3-{2-[5-Chloro-3-(4-fluoro-phenylamino)-6-methyl-2-oxo-2H-pyrazin-1-yl]-acetylamino}-benzyl)-carbamic acid tert-butyl ester

{3-[2-(5-Chloro-6-methyl-2-oxo-3-phenethylamino-2H-pyrazin-1-yl)-acetylamino]-benzyl}-carbamic acid tert-butyl ester

[6-Methyl-3-((S)-1-methyl-2-phenyl-ethylamino)-2-oxo-2H-pyrazin-1-yl]-acetic acid

[4-(6-Chloro-4-{[2-(1H-imidazol-4-yl)-ethylcarbamoyl]-methyl}-5-methyl-3-oxo-3,4-dihydro-pyrazin-2-ylamino)-cyclohexyl]-carbamic acid tert-butyl ester

(4-{4-[(3-Carbamoyl-phenylcarbamoyl)-methyl]-6-chloro-5-methyl-3-oxo-3,4-dihydro-pyrazin-2-ylamino}-cyclohexyl)-carbamic acid tert-butyl ester

N-[(6-amino-2-methylpyridin-3-yl)methyl]-2-[6-methyl-2-oxo-3-(2-phenylethylamino)pyrazin-1-yl]acetamide