Des-(4-dimethylamino-2-en-1-oxo)butylamino 6-(pyrrolidin-2,5-dion-1-yl) Afatinib is an intermediate in the synthesis of Des-(4-dimethylamino-2-en-1-oxo)butylamino 6-(5-Hydroxy-pyrrolidin-2-on-1-yl) Afatinib which is a derivative compound of Afatinib (A355300) used for the treatment of breast cancer and other cell lunger cancer related diseases.