1,7-Dimethyluric acid is a metabolite of caffeine produced by the action of xanthine oxidase on paraxanthine. It can be detected in urine as a biomarker of caffeine consumption.
1,7-Dimethyluric acid is the suitable reagent used for the simultaneous determination of plasma levels of theophylline and its metabolites without interference from caffeine or caffeine metabolites by HPLC.
ChEBI: An oxopurine that is 7,9-dihydro-1H-purine-2,6,8(3H)-trione substituted by methyl groups at N-1 and N-7. It is a metabolite of caffeine and is often found in human urine samples.
1,7-Dimethyluric acid is an important metabolite of caffeine. Electrochemical oxidation of 1,7-dimethyluric acid was studied over a wide pH range of 2.2-10.3 at solid electrodes.
[1] RYBAK MICHAEL E . Urine Excretion of Caffeine and Select Caffeine Metabolites Is Common in the US Population and Associated with Caffeine Intake1, 2, 3, 4[J]. Journal of Nutrition, 2015, 145 4: Pages 766-774. DOI:
10.3945/jn.114.205476
