2-PYRAZINECARBONITRIL FOR SYNTHESIS;NSC 166137;Pyrazinecarbonitrile (7CI,8CI,9CI);Pyrazinamide EP Impurity B;(1,4a-dimethyl-7-propan-2-yl-2,3,4,9,10,10a-hexahydrophenanthren-1-yl)methanol;Cyanopyrazine , 97.0%(GC);ANTI-CPZ(N-TERMINAL) antibody produced in rabbit;Carboxypeptidase Z