7-Methylxanthine552-62-5100 % similar 7-Methylguanine578-76-746 % similar Paraxanthine611-59-646 % similar Theobromine83-67-046 % similar 2,6-Dichloro-7-methyl-7H-purine2273-93-045 % similar Lumazine487-21-842 % similar 7-Methyladenine935-69-338 % similar Lumichrome1086-80-237 % similar 5-Chlorouracil1820-81-135 % similar Thymine65-71-435 % similar 5-Aminouracil932-52-535 % similar 5-Hydroxy-2,4(1H,3H)-pyrimidinedione20636-41-333 % similar 5-Ethyl-2,4(1H,3H)-pyrimidinedione4212-49-133 % similar 5-Methoxyuracil6623-81-033 % similar Xanthine69-89-633 % similar 5,6-Dimethyluracil26305-13-532 % similar 5-Bromouracil51-20-732 % similar 5-Fluorouracil51-21-832 % similar 5-Iodouracil696-07-132 % similar 5-Nitro-2,4(1H,3H)-pyrimidinedione611-08-530 % similar