The invention relates to substituted tetrahydro-pyrido-pyrimidine derivatives of the formula (I),wherein Y, R1, R2 and m are as defined in the description. Such compounds are suitable for the treatment of a disorder or disease which is mediated by the activity of the PI3K enzymes.本發明係關於式(I)之經取代之四氫吡啶并嘧啶衍生物,其中Y、R1、R2及m如本發明中所定義。該等化合物適於治療由PI3K酶活性介導之病症或疾病。