?5-Bromo-2-hydroxypyrimidine , its cas register number is 38353-06-9. It also can be called 2(1H)-Pyrimidinone, 5-bromo- ; 5-bromopyrimidin-2-ol ; 2-Hydroxy-5-bromopyrimidine ; and 5-Bromo-1H-pyrimidin-2-one .