Pyrimidine | 合法藥品大搜索

Pyrimidineisanaromaticheterocyclicorganiccompoundsimilartopyridine....Oneofthethreediazines(six-memberedheterocyclicswithtwonitrogenatomsinthe ...

Group of chemical compounds

Chemical compound

Pyrimidine is an aromatic heterocyclic organic compound similar to pyridine.[3] 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.[4]:250 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).

The pyrimidine ring system has wide occurrence in nature[5] as substituted and ring fused compounds and derivatives, including the nucleotides cytosine, thymine and uracil, thiamine (vitamin B1) and alloxan. It is also found in many synthetic compounds such as barbiturates and the HIV drug, zidovudine. Although pyrimidine derivatives such as uric acid and alloxan were...