4-(3-chloro-2-fluoroanilino)-7-methoxy-6-{[1-(N-methylcarbamoylmethyl)piperidin-4-yl]oxy}quinazoline difumarate, pharmaceutical compositions containing the difumarate, the use of the difumarate in the treatment of hyperproliferative disorders such as cancer and processes for the manufacture of the difumarate are described.本發明闡述4-(3-氯-2-氟苯胺基)-7-甲氧基-6-{[1-(N-甲基胺基甲醯基甲基)六氫吡啶-4-基]氧基}喹唑啉富馬酸氫鹽、包含該富馬酸氫鹽之醫藥組合物、該富馬酸氫鹽在治療過度增殖性病症(例如癌症)中之用途及該富馬酸氫鹽之製備方法。