2-Bromo-5-hydroxypyrazine (CAS NO.374063-92-0), its Synonyms are 5-Bromo-2-pyrazinol ; 5-Bromo-2-hydroxypyrazine ; 5-Bromo-2-pyrazinol ; 5-Bromopyrazin-2-ol ; 2(1H)-Pyrazinone, 5-bromo- ; 5-Bromopyrazin-2(1H)-one .