The present invention is directed to a substituted pyrimidine compound of formula (I)or an enantiomer thereof, or a prodrug or a pharmaceutically acceptable salt thereof, or a pharmaceutical composition comprising such a compound. The invention also includes a method of treatment of a patient by the administration of a pharmaceutically effective amount of such a compound.本發明係針對一種式(I)之經取代的嘧啶化合物:或其對映異構體,或前體藥物或其藥學上可接受的鹽,或一種包含此種化合物的醫藥組成物。本發明還包括一個藉由投與藥學上有效量的此種化合物來治療患者的方法。