7-Deazaxanthine39929-79-831 % similar 5-Bromo-2-fluoro-4-methyl-pyridine864830-16-031 % similar 5-Bromo-3-methyl-2(1H)-pyridinone89488-30-231 % similar 4-Thiouracil591-28-631 % similar 6-Azathymine932-53-631 % similar 4-Bromopyridin-3-ol161417-28-330 % similar 5,6-Dimethyluracil26305-13-530 % similar 5,6-Diaminouracil3240-72-030 % similar 5-Bromo-2-methylpyrimidine-4-carboxylic acid100707-39-930 % similar 2-Bromopyrimidin-5-ol1240621-87-730 % similar