1,3,7-TRIMETHYLURIC ACID, also referred to as TRIMETHYLURIC ACID and
8-OXY-CAFFEINE, is a purine alkaloid that is produced in some plants
and occurs as a minor metabolite of caffeine in humans. The enzymes
that metabolize caffeine into 1,3,7-trimethyluric acid in humans
* ^ "1,3,7-trimethyluric acid". PubChem Compound. National Center for Biotechnology Information. Retrieved 10 August 2014. * ^ "Pharmacology". Caffeine. DrugBank. University of Alberta. 16 September 2013. Retrieved 8 August 2014.