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.

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Skeletal formula of pteridine
Skeletal formula of pteridine
Pteridine molecule
C=black, H=white, N=blue
Pteridine molecule
C=black, H=white, N=blue
Synthesis of pteridine from 4,5-diaminopyrimidine and glyoxal