Chlorphenamine Maleate - Impurity A (Dihydrochloride Salt)

2-(4-Chlorophenyl)-4-(dimethylamino)-2-(2-(dimethylamino)ethyl)butanenitrile 
Dihydrochloride; [2-(Dimethylamino)ethyl]butanenitrile Dihydrochloride, 2-(4-chlorophenyl)-4-(dimethylamino)-2-;