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].)