has role geroprotector mutagen oxopurine trimethylxanthine caffeine CHEBI:27732 A trimethylxanthine in which the three methyl groups are located at positions 1, 3, and 7. A purine alkaloid that occurs naturally in tea and coffee. central nervous system stimulant psychotropic drug analgesic diuretic hypoglycemic agent antineoplastic agent xenobiotic immunosuppressive agent antirheumatic drug anti-arrhythmia drug antiparkinson drug EC 3.1.4.* (phosphoric diester hydrolase) inhibitor vasoconstrictor agent antipsoriatic EC 2.7.11.1 (non-specific serine/threonine protein kinase) inhibitor adenosine A2A receptor antagonist adjuvant food additive anti-HIV agent anti-inflammatory agent ryanodine receptor agonist anti-obesity agent mouse metabolite anti-anaemic agent plant metabolite fungal metabolite environmental contaminant human blood serum metabolite