5,6-Diamino-1,3-dimethyluracil5440-00-6100 % similar Theacrine2309-49-145 % similar 6-Amino-1,3-dimethyluracil6642-31-537 % similar 3,7-Dihydro-1,3,7,8-tetramethyl-1H-purine-2,6-dione832-66-637 % similar Caffeine58-08-236 % similar Theophylline58-55-936 % similar 8-Chlorotheophylline85-18-735 % similar Aminophylline317-34-035 % similar 1,3-Dimethyluric acid944-73-034 % similar 1H-Purine-2,6-dione, 3,7-dihydro-1,3,7-trimethyl-, hydrate (1:1)5743-12-433 % similar 1,3-Dimethylxanthine monohydrate5967-84-033 % similar 8-(Dimethylamino)-3,9-dihydro-1,3-dimethyl-1H-purine-2,6-dione5426-47-133 % similar Etofylline519-37-930 % similar