4-(DIISOPROPYLAMINO)-2-PHENYL-2-(2-PYRIDYL)-BUTYRONITRILE;4-(DIISOPROPYLAMINO)-2-PHENYL-2-(PYRIDIN-2-YL)BUTANENITRILE;(2-(Bis(1-methylethyl)amino)ethyl)-phenyl-2-pyridineacetonitrile;3-[2-(2-fluorophenyl)-1,3-dithian-2-yl]-4-[(phenylmethyl)amino]cyclobut-3-ene-1,2-dione;-(-(Diisopropyl)aminoethyl)-phenyl-2-pyridiylacetonitrile;4-Diisopropylamino-2-phenyl-2-(2-pyridyl)butanenitrile;alpha-[2-[bis(isopropyl)amino]ethyl]-alpha-phenylpyridine-2-acetonitrile;Disopyramide EP Impurity A