Pyrimidine waa unug heterocyclic organic arter oo kale oo la mid ah pyridine. Mid ka mid ah saddexda diazin (lix xubnood oo heterocyclics ah oo leh laba atomojiyam oo ku jira giraanta), wuxuu leeyahay xakamaynta nitrogen ee booska 1 iyo 3 ee giraanta .: 250 Diasia kale waa pyrazine (jimicsiyada nitrogen ee boosaska 1 iyo 4) iyo pyridazine (xagasha nitrogen ee boosaska 1 iyo 2). Nucleic acid, saddex nooc oo nukleobase ah waa phyrimidine derivatives: cytosine (C), thymine (T), iyo uracil (U).

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