The present invention is directed to a 2,6-substituted-4-monosubstitutedamino-pyrimidine compound of formula (I)or an enantiomer thereof, or an ester 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.本發明係針對一種結構式為(I)的2,6-取代-4-單取代胺基嘧啶化合物或其對映異構體、或酯類前藥或其藥學上可接受的鹽,或一種包含此化合物的醫藥組合物。本發明還包括透過施用療效量的此種化合物來治療患者的方法。