Pyrimidone

4-Pyrimidone
Names
	IUPAC name Pyrimidone
	Other names Hydroxypyrimidine; Pyrimidinone
Identifiers
CAS Number	51953-17-4 ;
3D model (JSmol)	Interactive image;
ChemSpider	61686 2-Pyrimidone; 19489 4-Pyrimidone;
PubChem CID	20695;
	SMILES O=C1NC=NC=C1;
Properties
Chemical formula	C4H4N2O
Molar mass	96.089 g·mol−1
Appearance	White to light yellow powder
Melting point	163 to 168 °C (325 to 334 °F; 436 to 441 K)
Hazards
Main hazards	Respiratory system, eye, skin irritation
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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	Infobox references

Pyrimidone is the name given to either of two heterocyclic compounds with the formula C₄H₄N₂O: 2-pyrimidone and 4-pyrimidone. The compounds can also be called 2-hydroxypyrimidine or 4-hydroxypyrimidine respectively, based on a substituted pyrimidine, or 1,3-diazine, ring.

Derivatives

Derivatives of pyrimidone are the basis of many other biological molecules, including:

Nucleobases, such as cytosine
Barbiturates, such as metharbital

Antiulcer drugs including temelastine, icotidine, donetidine, and lupitidine.

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