Cholesterol ester transfer protein which comprises as an active ingredient a compound represented by the general formula (1) the present invention, (CETP) inhibitor. [Formula 1] Wherein one of R 1, represents an alkyl group having 1 to 5 carbon atoms or a hydrogen atom, R 2 represents a geranyl group or dimethylallyl group. ]本発明は、一般式(1)で表される化合物を有効成分として含有するコレステロールエステル転送タンパク質(CETP)阻害剤。【化1】[式中、R1は、水素原子又は炭素数1~5のアルキル基を表し、R2は、ジメチルアリル基又はゲラニル基を表す。]