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Additional
pyrimidine
English Wikipedia - The Free Encyclopedia
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Pyrimidine
Pyrimidine
is an
aromatic
heterocyclic
organic compound
similar to
pyridine
. One of the three
diazines
(six-membered heterocyclics with two
nitrogen
atoms in the ring), it has the nitrogen atoms at positions 1 and 3 in the ring. The other diazines are
pyrazine
(nitrogen atoms at the 1 and 4 positions) and
pyridazine
(nitrogen atoms at the 1 and 2 positions). In
nucleic acids
, three types of
nucleobases
are pyrimidine derivatives:
cytosine
(C),
thymine
(T), and
uracil
(U).
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