5-Oxo-4,5-dihydropyrazine-2-carboxylic acid
3-Oxo-3,4-dihydropyrazine-2-carboxylic acid
6-Oxo-1,6-dihydropyrazine-2-carboxylic acid
Sodium (3-oxo-3,4-dihydropyrazine-2-carbonyl)amide
6-Methyl-5-oxo-4,5-dihydropyrazine-2-carboxylic acid
5,6-Dimethyl-2,3-dihydropyrazine
