Pyrazine definitions

A crystalline organic base, C₄ H₄ N₂ , having a six-member aromatic ring in which the first and fourth atoms are nitrogen and the rest are carbon.

Any of a group of compounds derived from or structurally related to this base. Pyrazines occur in pteridines, some vitamins, and certain dyes such as phenazine.

A crystalline organic base, C₄ H₄ N₂ , having a six-member aromatic ring in which the first and fourth atoms are nitrogen and the rest are carbon.

Any of a group of compounds derived from or structurally related to this base. Pyrazines occur in pteridines, some vitamins, and certain dyes such as phenazine.

Any of a group of organic compounds having a six-member ring in which the first and fourth atoms are nitrogen and the rest are carbon. Pyrazines are components of many important compounds, including pteridines, some vitamins and antibiotics, and numerous dyes called phenazines.