The invention relates to a novel group of compounds of Formula (I) or salts thereof:wherein Y,Z1,Z2,R1,R4,R5and n are as described in the specification, which may be useful in the treatment or prevention of a disease or medical condition mediated through protein kinase B (PKB) such as cancer. The invention also relates to pharmaceutical compositions comprising said compounds, methods of treatment of diseases mediated by PKB using said compounds and methods for preparing compounds of Formula (I).本發明係關於一種新穎的式(I)化合物或其鹽:其中Y、Z1、Z2、R1、R4、R5及n如本說明書中所述,其適用於治療或預防經蛋白質激酶B(PKB)介導之疾病或醫學病況,諸如癌症。本發明亦係關於包含該等化合物之醫藥組合物、使用該等化合物治療由PKB介導之疾病的方法及製備式(I)化合物之方法。