4-(4-Chlorobiphenyl)-4-hydroxy-N,N-dimethyl-?,?-diphenyl-1-piperidinebutanamide; 4-[4-(4-Chlorobiphenyl-4-yl)-4-hydroxypiperidin-1-yl]-N,N-dimethyl-2,2-diphenylbutanamide; Loperamide Impurity A; Loperamide EP Impurity A;4-Dechloro-4-(4-chlorophenyl) Loperamide
