1-Methylxanthine6136-37-4100 % similar Theophylline58-55-949 % similar Aminophylline317-34-047 % similar 3-Methylxanthine1076-22-845 % similar 1,3-Dimethylxanthine monohydrate5967-84-045 % similar Paraxanthine611-59-645 % similar Ibmx28822-58-441 % similar Xanthine69-89-639 % similar 6-Thioxanthine2002-59-737 % similar 2-Thioxanthine2487-40-337 % similar 1,3-Dimethyluric acid944-73-037 % similar 6-Chloro-3-methyl-2,4(1H,3H)-pyrimidinedione4318-56-336 % similar Englate8000-10-036 % similar N2-Acetylguanine19962-37-935 % similar Hypoxanthine68-94-034 % similar 8-(Dimethylamino)-3,9-dihydro-1,3-dimethyl-1H-purine-2,6-dione5426-47-133 % similar Caffeine58-08-233 % similar 3,9-Dihydro-1H-purine-2,6-dithione5437-25-233 % similar 8-Chlorotheophylline85-18-732 % similar 3-Methyl-5-β-D-ribofuranosyl-2,4(1H,3H)-pyrimidinedione81691-06-732 % similar