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5-Oxo-4,5-dihydropyrazine-2-carboxylic acid: BD4084734604-60-998%; ￥91.05g

3-Oxo-3,4-dihydropyrazine-2-carboxylic acid: BD261420737-42-297%; ￥978.0100g

6-Oxo-1,6-dihydropyrazine-2-carboxylic acid: BD24897613924-99-795%; ￥964.0250mg

Sodium (3-oxo-3,4-dihydropyrazine-2-carbonyl)amide: BD007961341237524-82-197%; ￥119.01g

6-Methyl-5-oxo-4,5-dihydropyrazine-2-carboxylic acid: BD23087477168-83-397%; ￥1487.01g

5,6-Dimethyl-2,3-dihydropyrazine: BD30457315986-92-295%; ￥4615.01g

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