2,8-Dimercapto-6-hydroxypurine15986-32-032 % similar 5-Iodouracil696-07-131 % similar 2,4-Dithiouracil2001-93-631 % similar 5-Methylcytosine hydrochloride58366-64-631 % similar 4-Amino-2-chloro-5-methylpyrimidine14394-70-831 % similar 2-Fluoro-4-iodo-5-methylpyridine153034-94-731 % similar Lumichrome1086-80-230 % similar 1,2-Dihydro-6-hydroxy-4-methyl-2-oxo-3-pyridinecarbonitrile5444-02-030 % similar 3-Cyano-4,6-dimethyl-2-hydroxypyridine769-28-830 % similar