Define Pyrazines. Pyrazines synonyms, Pyrazines pronunciation, Pyrazines translation, English dictionary definition of Pyrazines. n. 1. A crystalline organic base, C4H4N2, having a six-member aromatic ring in which the first and fourth atoms are nitrogen
in cocoa products, coffee, dairy products, oatmeal, galbanum oil, roasted peanuts, soybean, beans, mushroom, trassi, coriander seed, rice bran, trassi, sukiyaki, soy sauce, malt, licorice, dried bonito, wild rice, shrimp, crab, clam, scallop, filberts, rum, sake, wine, whiskey, burley ...