pyrazine

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Pyr´a`zine

(Org. Chem.) A feebly basic solid, C4H4N2, obtained by distilling piperazine with zinc dust, and in other ways. Also, by extension, any of various derivatives of the same.

pyrazine (p

-z

)

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.

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phenazine piperazine pteridine			The green bell pepper flavor of Cabernet Sauvignon is caused by the presence of pyrazines in the grapes. The Various Flavors of Cabernet Sauvignon by Lynette Tyson / Food/cooking/nutrition community Treatt offers over 300 speciality chemical top notes, including pyrazines, thiazoles and other sulphur, nitrogen and oxygen heterocyclic chemicals, manufactured by Endeavour Specialty Chemicals. Savoury specialities on the menu for Treatt by Food Trade Review Both pyrazines were prevalent in the cloth wrapper in a range of 100 ppb to 450 ppb and in the outer rind of the cheeses in a range of 100 ppb to 705 ppb. Pyrazine compounds contribute to earthy-bell pepper flavor in Cheddar ... by Emerging Food R&D Report			pyramidal pyramidal bone pyramidal motor system Pyramidal numbers pyramidal orchid pyramidal peak pyramidal tent pyramidal tract Pyramidally Pyramidic pyramidical pyramidically pyramiding Pyramidion Pyramidoid Pyramids of Egypt Pyramis Pyramoid Pyramus Pyramus and Thisbe pyran pyranometer pyrargyrite Pyrausta Pyrausta nubilalis pyrazine pyrazole pyre pyrectic Pyrena pyrene Pyrenean Pyrenean mountain dog Pyrenees Pyrénées Pyrenees daisy Pyrénées-Orientales pyrenoid Pyrenomycetes pyrethrin Pyrethrine pyrethroid pyrethrum pyretic pyretography pyretology pyretotherapy Pyrex Pyrex dish pyrexia Pyrexial			pyran pyran Pyranees Pyranees Pyranga rubra Pyranocoumarins Pyranocoumarins Pyranocoumarins Pyranograph Pyranometer Pyranometer pyranose pyranose Pyranose 2-Oxidase pyranoside Pyrans Pyrans Pyrans pyrantel Pyrantel pamoate pyrargyrite pyrargyrite Pyrates Confraternity Pyrausta Pyrausta nubilalis Pyraustinae Pyrazinamide Pyrazinamide Pyrazinamide Pyrazinamide, Rifampin, Isoniazid, Streptomycin and Ethambutol pyrazine Pyrazine ring pyrazinecarboxamide Pyrazines Pyrazines Pyrazole Pyrazoles Pyrazoline pyrazolone pyrazolone derivatives pyrazolone dye Pyrazolones PYRC pyre pyrectic pyrectic Pyreenes Pyreenes Pyrena pyrene pyrene Pyrenean Pyrenean Pyrenean Pyrenean Chamois Pyrenean desmen Pyrenean desmen Pyrenean Fanciers of the Northeast Pyrenean goat Pyrenean goat Pyrenean Mountain Dog

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pyrazine