Pteridine

A pteridine is a bicyclic heterocyclic system with two nitrogen atoms at positions 1 and 4 in ring A, and two nitrogen atoms at positions 1 and 3 in ring B. Pteridines constitute a large group of heterocyclic compounds containing a wide variety of substituents on this parent structure. Pterins and flavins are classes of substituted pteridines that have diverse biological roles.^[2]

Synthesis of pteridine from 4,5-diaminopyrimidine and glyoxal

Pteridine

Skeletal formula of pteridine
C=black, H=white, N=blue C=black, H=white, N=blue
Names
Preferred IUPAC name Pteridine[1]
Identifiers
CAS Number	91-18-9 Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:27601 N
ChemSpider	1014 N
KEGG	C07581 N
PubChem CID	1043
UNII	6EZF26XQ81 Y
CompTox Dashboard (EPA)	DTXSID60238347
InChI InChI=1S/C6H4N4/c1-2-9-6-5(8-1)3-7-4-10-6/h1-4H N Key: CPNGPNLZQNNVQM-UHFFFAOYSA-N N InChI=1/C6H4N4/c1-2-9-6-5(8-1)3-7-4-10-6/h1-4H Key: CPNGPNLZQNNVQM-UHFFFAOYAU
SMILES C1=CN=C2C(=N1)C=NC=N2
Properties
Chemical formula	C6H4N4
Molar mass	132.126 g·mol−1
Melting point	139.5 °C (283.1 °F; 412.6 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

See also

• Dihydrobiopterin
• Pyrazine
• Pyrimidine
• Tetrahydrobiopterin