Purine

Purine
Names
	IUPAC name 9H-purine
Identifiers
CAS Number	120-73-0 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:17257 ;
ChEMBL	ChEMBL302239 ;
ChemSpider	1015 ;
ECHA InfoCard	100.004.020
KEGG	C15587 ;
MeSH	Purine
PubChem CID	1044;
UNII	W60KTZ3IZY ;
CompTox Dashboard (EPA)	DTXSID5074470 ;
	InChI InChI=1S/C5H4N4/c1-4-5(8-2-6-1)9-3-7-4/h1-3H,(H,6,7,8,9) Key: KDCGOANMDULRCW-UHFFFAOYSA-N ; InChI=1/C5H4N4/c1-4-5(8-2-6-1)9-3-7-4/h1-3H,(H,6,7,8,9) Key: KDCGOANMDULRCW-UHFFFAOYAO;
	SMILES c1c2c(nc[nH]2)ncn1;
Properties
Chemical formula	C5H4N4
Molar mass	120.115 g·mol−1
Melting point	214 °C (417 °F; 487 K)
Solubility in water	500 g/L (RT)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Purine is a heterocyclic aromatic organic compound that consists of two rings (pyrimidine and imidazole) fused together. It is water-soluble. Purine also gives its name to the wider class of molecules, purines, which include substituted purines and their tautomers. They are the most widely occurring nitrogen-containing heterocycles in nature.