Pterin

Pterin is a heterocyclic compound composed of a pteridine ring system, with a "keto group" (a lactam) and an amino group on positions 4 and 2 respectively. It is structurally related to the parent bicyclic heterocycle called pteridine. Pterins, as a group, are compounds related to pterin with additional substituents. Pterin itself is of no biological significance.

Pterin
Names
IUPAC names
2-Aminopteridin-4(3H)-one
(one of many tautomers; see text)
Other names
Pteridoxamine
Pterine
4-Oxopterin
2-Amino-4-pteridone
2-Amino-4-hydroxypteridine
2-Amino-4-oxopteridine
2-aminopteridin-4-ol
2-Amino-4-pteridinol
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.017.091
UNII
  • InChI=1S/C6H5N5O/c7-6-10-4-3(5(12)11-6)8-1-2-9-4/h1-2H,(H3,7,9,10,11,12) Y
    Key: HNXQXTQTPAJEJL-UHFFFAOYSA-N Y
  • InChI=1/C6H5N5O/c7-6-10-4-3(5(12)11-6)8-1-2-9-4/h1-2H,(H3,7,9,10,11,12)
    Key: HNXQXTQTPAJEJL-UHFFFAOYAD
  • O=C2\N=C(/Nc1nccnc12)N
Properties
C6H5N5O
Molar mass 163.137
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

Pterins were first discovered in the pigments of butterfly wings (hence the origin of their name, from the Greek pteron (πτερόν), wing) and perform many roles in coloration in the biological world.

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