Pyrazine is a heterocyclic aromatic organic compound with the chemical formula C4H4N2. It is a symmetrical molecule with point group D2h. Pyrazine is less...

Pteridine is an aromatic organic compound composed of fused pyrimidine and pyrazine rings. Pteridines also constitute a group of heterocyclic compounds containing...

heterocyclic compound containing a ring complex made up of a benzene ring and a pyrazine ring. It is isomeric with other naphthyridines including quinazoline, phthalazine...

structural isomers: pyridazine (1,2-diazine) pyrimidine (1,3-diazine) pyrazine (1,4-diazine) 6-membered rings with one nitrogen atom: pyridines 6-membered...

also known as Grindstaff pyrazine) is a methoxypyrazine that is very similar to isopropyl methoxy pyrazine except that the alkyl side-group contains...

flavour is most widely recognised, caused by pyrazines, which are more prevalent in under-ripened grapes. Pyrazine compounds are present in all Cabernet Sauvignon...

This is also a naturally occurring compound in Sauvignon grapes, and so pyrazine taint has been known to make Rieslings taste like Sauvignon blanc.[citation...

It is isomeric with two other diazine (C4H4N2) rings, pyrimidine and pyrazine. Pyridazines are rare in nature, possibly reflecting the scarcity of naturally...

ethylene glycol on ethylene diamine hydrochloride, or by reduction of pyrazine with sodium in ethanol. A form in which piperazine is commonly available...

Alkylpyrazines are chemical compounds based on pyrazine with different substitution patterns. Some alkylpyrazines are naturally occurring highly aromatic...

highly odorous metabolites from an actinomycete: 2-Isopropyl-3-methoxy-pyrazine, methylisoborneol, and geosmin. Nancy N. Gerber, Journal of Chemical Ecology...

functionalised 1,4-dihydropyrazines 5 which can be aromatized to 1,4-pyrazines 6 in the presence of acid. 2,5-DKPs have been shown to play a role in...

nitrogen atoms at positions 1 and 3 in the ring.: 250  The other diazines are pyrazine (nitrogen atoms at the 1 and 4 positions) and pyridazine (nitrogen atoms...

rings   Benzene Naphthalene Anthracene Pyridine Quinoline Isoquinoline Pyrazine Quinoxaline Acridine Pyrimidine Quinazoline   Pyridazine Cinnoline Phthalazine...

hydroxide and 2,3,5-Trimethyl-5,6-dihydro-pyrazine is 3:1, the mass ratio of ethanol to 2,3,5-trimethyl-5,6-dihydro-pyrazine 10:1,reaction temperature 68 °C, reaction...

yellow-brown powder at room temperature. Chemically, acetylpyrazine is a pyrazine and a ketone. Acetylpyrazine is found in foods such as seeds, nuts and...

organic compound with the formula (C6H4)2N2. It is a dibenzo annulated pyrazine, and the parent substance of many dyestuffs, such as the toluylene red...

Miyazono, Sadaharu; Kashiwayanagi, Makoto (2015). "The scent of wolves: Pyrazine analogs induce avoidance and vigilance behaviors in prey". Frontiers in...

earthy flavour, but usually with more bitterness than arabica due to its pyrazine content. Since arabica beans are believed to have smoother taste with more...

dipeptide better known as cyclo(prolylglycyl), i.e. (S)-hexahydropyrrolo[1,2-a]pyrazine-1,4-dione. Not to be confused with a cyclopropanyl moiety. "Omberacetam"...

chocolate had higher levels of Strecker aldehydes, and lower levels of pyrazines. The dried beans are then transported to a chocolate manufacturing facility...

depending on the location of the second N, pyridazine, pyrimidine, or pyrazine. Four chemical processes contribute to industrial benzene production: catalytic...

The most odorous chemicals in cigar smoke are pyridines. Along with pyrazines, they are also the most odorous chemicals in cigar smokers' breath. These...

complements a small bowl of rice. Nattō odor comes from diacetyl and pyrazines, but if it is allowed to ferment too long, then ammonia is released. The...

cuminaldehyde. Other aroma compounds of toasted cumin are the substituted pyrazines, 2-ethoxy-3-isopropylpyrazine, 2-methoxy-3-sec-butylpyrazine, and...

with more than 9 rings, consider cephalostatin-1, a steroidic 13-ringed pyrazine with the empirical formula C54H74N2O10 isolated from the Indian Ocean hemichordate...

liken to hops or cannabis. The responsible substance very likely is a pyrazine, which also occurs in both plants. At the Rotterdam Zoo, this smell once...

harvested. Many of the phenolic compounds and aroma compounds, such as pyrazine, that contribute to strong grassy flavours are found in the grape skins...

mashing process, particularly through formation of 2-furanmethanol and pyrazines imparting nutty or cereal characteristics contributes to the baked bread...

7-Nitroso-3-(trifluoromethyl)-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyrazine a Nitrosamine This disambiguation page lists articles associated with the...