The present invention provides MDM2 inhibitor compounds of Formula I, wherein the variables are defined above, which compounds are useful as therapeutic agents, particularly for the treatment of cancers. The present invention also relates to pharmaceutical compositions that contain an MDM2 inhibitor.本發明提供式I之MDM2抑制劑化合物,其中變數如下文中所定義,該等化合物適用作治療劑,尤其用於治療癌症。本發明亦關於含有MDM2抑制劑之醫藥組合物。