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6-acetyl-2-amino-3,7,8,9-tetrahydropyrimido[4,5-b][1,4]diazepin-4-one is a member of the class of pyrimidodiazepine 3,7,8,9-tetrahydropyrimido[4,5-b][1,4]diazepin-4-one bearing amino and acetyl substituents at positions 2 and 6 respectively. It has a role as a metabolite. It is a pyrimidodiazepine and a methyl ketone.

2'-Deoxysepiapterin is a metabolite of the catabolism of tetrahydrobiopterin, present in variable amounts in various human biofluids (blood, urine, feces) and tissues (kidney, liver, adrenal, brain, and blood). (PMID 6638488, 7356152, 7374483) 2'-Deoxysepiapterin can also be degraded or catabolized by microorganisms located within the cecal contents (PMID 7469409).

A member of the class of pyrimidodiazepine 3,7,8,9-tetrahydropyrimido[4,5-b][1,4]diazepin-4-one bearing amino and acetyl substituents at positions 2 and 6 respectively." []