A compound represented by the formula (I)wherein R1 and R2 are each a hydrogen atom, an alkyl group and the like, R3 is a hydrogen atom, an alkyl group and the like, R4 is a hydrogen atom, an alkyl group and the like, m is an integer of 0 to 3, X is a bond, an oxygen atom or a sulfur atom, Y is a carbonyl group, a hydroxymethylene group and the like, and Z is a halogen atom, an alkyl group, an aryl group, a heteroaryl group and the like, or a pharmaceutically acceptable salt thereof has a superior PPARα agonist action and a lipid-lowering action, and is useful as a prophylactic or therapeutic drug for hyperlipidemia and the like.
