Theacrine2309-49-1100 % similar 3,7-Dihydro-1,3,7,8-tetramethyl-1H-purine-2,6-dione832-66-653 % similar Caffeine58-08-252 % similar 1H-Purine-2,6-dione, 3,7-dihydro-1,3,7-trimethyl-, hydrate (1:1)5743-12-447 % similar 5,6-Diamino-1,3-dimethyluracil5440-00-645 % similar Theophylline58-55-943 % similar Etofylline519-37-943 % similar 8-Chlorotheophylline85-18-742 % similar 1,3-Dimethyluric acid944-73-041 % similar Proxyphylline603-00-940 % similar Acefylline652-37-940 % similar Doxofylline69975-86-640 % similar 1,3-Dimethylxanthine monohydrate5967-84-039 % similar 8-(Dimethylamino)-3,9-dihydro-1,3-dimethyl-1H-purine-2,6-dione5426-47-138 % similar Diprophylline479-18-538 % similar Aminophylline317-34-038 % similar 3,9-Dihydro-1,3-dimethyl-8-(phenylmethyl)-1H-purine-2,6-dione2879-15-436 % similar Oxtriphylline4499-40-534 % similar Paraxanthine611-59-633 % similar 6-Amino-1,3-dimethyluracil6642-31-532 % similar