8-Chlorotheophylline85-18-7100 % similar 1,3-Dimethyluric acid944-73-065 % similar 8-(Dimethylamino)-3,9-dihydro-1,3-dimethyl-1H-purine-2,6-dione5426-47-162 % similar Dimenhydrinate523-87-556 % similar 3,9-Dihydro-1,3-dimethyl-8-(phenylmethyl)-1H-purine-2,6-dione2879-15-453 % similar Theophylline58-55-951 % similar Aminophylline317-34-049 % similar 1,3-Dimethylxanthine monohydrate5967-84-048 % similar Pamabrom606-04-247 % similar Theacrine2309-49-142 % similar Furafylline80288-49-938 % similar 3,7-Dihydro-1,3,7,8-tetramethyl-1H-purine-2,6-dione832-66-638 % similar Englate8000-10-037 % similar Ibmx28822-58-437 % similar 5,6-Diamino-1,3-dimethyluracil5440-00-635 % similar Caffeine58-08-234 % similar 1H-Purine-2,6-dione, 3,7-dihydro-1,3,7-trimethyl-, hydrate (1:1)5743-12-432 % similar 1-Methylxanthine6136-37-432 % similar 6-Chloro-1,3-dimethyl-2,4(1H,3H)-pyrimidinedione6972-27-632 % similar Oxtriphylline4499-40-531 % similar