The chemical Caffeine has a designated molecular formula of C8H10N4O2 and a molecular weight of 194.194 g/mol. Synonyms may include: 5-26-13-00558 (Beilstein Handbook Reference), AI3-20154, Alert-pep, Anhydrous caffeine, BRN 0017705, Cafamil, Cafecon, Cafeina, Caffedrine, Caffein, Caffeina [Italian], Caffeine (ChemID). Caffeine has been assigned a MeSH pharmacological action of: Phosphodiesterase Inhibitor, Purinergic P1 Receptor Antagonist.