Theophylline58-55-9100 % similar 1,3-Dimethylxanthine monohydrate5967-84-091 % similar Aminophylline317-34-085 % similar Englate8000-10-066 % similar Ibmx28822-58-465 % similar 8-Chlorotheophylline85-18-751 % similar 1,3-Dimethyluric acid944-73-050 % similar 1-Methylxanthine6136-37-449 % similar 3,9-Dihydro-1,3-dimethyl-8-(phenylmethyl)-1H-purine-2,6-dione2879-15-448 % similar 8-(Dimethylamino)-3,9-dihydro-1,3-dimethyl-1H-purine-2,6-dione5426-47-148 % similar Caffeine58-08-245 % similar Theacrine2309-49-143 % similar 1H-Purine-2,6-dione, 3,7-dihydro-1,3,7-trimethyl-, hydrate (1:1)5743-12-442 % similar Etofylline519-37-941 % similar Diprophylline479-18-540 % similar Pamabrom606-04-240 % similar Proxyphylline603-00-940 % similar Acefylline652-37-940 % similar Oxtriphylline4499-40-539 % similar Doxofylline69975-86-639 % similar