-
Pyrazine is a
heterocyclic aromatic organic compound with the
chemical formula C4H4N2. It is a
symmetrical molecule with
point group D2h.
Pyrazine is less...
-
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...
- It is
isomeric with two
other diazine (C4H4N2) rings,
pyrimidine and
pyrazine.
Pyridazines are rare in nature,
possibly reflecting the
scarcity of naturally...
- also
known as
Grindstaff pyrazine) is a
methoxypyrazine that is very
similar to
isopropyl methoxy pyrazine except that the
alkyl side-group contains...
- 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...
- two
pentammineruthenium units linked to the
nitrogen atoms in a
bridging pyrazine ligand,
which completes the
octahedral coordination sphere of each metal...
-
flavour is most
widely recognised,
caused by
pyrazines,
which are more
prevalent in under-ripened grapes.
Pyrazine compounds are
present in all
Cabernet Sauvignon...
-
highly odorous metabolites from an actinomycete: 2-Isopropyl-3-methoxy-
pyrazine, methylisoborneol, and geosmin.
Nancy N. Gerber,
Journal of
Chemical Ecology...
-
toxic alkaloids,
azamacrolides and polyamines, as well as foul-smelling
pyrazines.
Coccinellids can
produce at
least 50
types of alkaloids. When disturbed...
- with more than 9 rings,
consider cephalostatin-1, a
steroidic 13-ringed
pyrazine with the
empirical formula C54H74N2O10
isolated from the
Indian Ocean hemichordate...
