caffeine1,3,7-Trimethylxanthine1,3,7-trimethyl-2,6-dioxopurine1,3,7-trimethylpurine-2,6-dione1,3,7-trimethylxanthine1-methyltheobromine3,7-Dihydro-1,3,7-trimethyl-1H-purin-2,6-dion7-methyltheophyllineCAFFEINECaffeineCoffeinKoffeinTheinanhydrous caffeinecafeinacafeinecaffeineguaraninemateinamethyltheobromineteinatheine