2-Pyrazinecarbonitrile,5-bromo-, its cas register number is 221295-04-1. It also can be called 2-Bromo-5-cyanopyrazine ; 5-bromopyrazine-2-carbonitrile ; 2-pyrazinecarbonitrile, 5-bromo- pyrazinecarbonitrile, 5-bromo- (9cl) and so on.