Compounds having the structure of Formula I, including pharmaceutically acceptable salts of the compounds, are CETP inhibitors and are useful for raising HDL-cholesterol, reducing LDL-cholesterol, and for treating or preventing atherosclerosis. In the compound of Formula I, A3 is a substitiuted phenyl group or indanyl group.一種具有式I結構之化合物,包括該等化合物之醫藥學上可接受之鹽,其為CETP抑制劑且適用於升高HDL-膽固醇、降低LDL-膽固醇且適用於治療或預防動脈粥樣硬化。在式I化合物中,A3為經取代苯基或茚滿基。