D5-PerampanelPerampanel-D? (1.0mg/ml in Acetonitrile)Perampanel-d5 (1.0mg/ml in Acetonitrile)2-(6'-oxo-1'-(phenyl-d5)-1',6'-dihydro-[2,3'-bipyridin]-5'-yl)benzonitrile2-{6'-oxo-1'-[(2,3,4,5,6-2H?)phenyl]-1',6'-dihydro-[2,3'-bipyridin]-5'-yl}benzonitrile