The present invention provides a compound represented by formula [I], the compound exhibiting the effect of inhibiting an enzyme that produces 20-HETE, or a pharmaceutically acceptable salt thereof. (In formula [I], the structure represented by formula [II] indicates any one of the structures represented by formula group [III]; R1, R2, R3, and R4 independently indicate a hydrogen atom, a fluorine atom, a methyl group or the like; and R5 indicates any one of the structures represented by formula group [IV]).本發明提供具有阻礙產生20-HETE之酵素的作用之下述式[I]表示之化合物或其製藥學上容許之鹽。(上述式[I]中,下述式[II]表示之構造,係表示下述式群[III]表示之構造之任一者;R1、R2、R3,及R4係獨立地表示氫原子、氟原子、甲基等,R5表示下述式群[IV]表示之構造之任一者:,,,。