The molecule is a member of the family of pteridines that is 2-amino-6,7-dimethyl-4-oxo-4,8-dihydropteridine in which the hydrogen at position 8 is replaced by a D-ribityl group. It derives from a ribitol.
2-amino-6,7-dimethyl-8-[(2S,3S,4R)-2,3,4,5-tetrahydroxypentyl]pteridin-4-one