C 7 H 8 N 4 O 2

C 7 H 8 N 4 O 2er molekylformlen for flere isomerer .

• Xanthine
  • theophyllin eller 1,3-dimethyl-7H-purin-2,6-dion, CAS-nummer 58-55-9
  • theobromin eller 3,7-dihydro-3,7-dimethyl-1H-purin-2,6-dion, CAS-nummer 83-67-0
  • paraxanthin , CAS-nummer 611-59-6