A compound represented by the following general formula (I): <；CHEM>； (wherein R<；1>； represents phenyl, etc. which can have substituents selected from the group consisting of C1-8 alkyl, C1-8 alkyl having halogen, halogen, hydroxyl, etc.； R<；2>； represents C1-8 alkyl, etc.； A represents oxygen, sulfur, etc.； X represents C1-8 alkylene chain, etc.； Y represents C(=O), CH=CH, etc.； R<；3>；, R<；4>；, and R<；5>； each represents hydrogen, C1-8 alkyl, etc.； B represents CH or nitrogen； Z represents oxygen or sulfur； R<；6>； and R<；7>； each represents hydrogen, C1-8 alkyl, etc.； and R<；8>； represents hydrogen or C1-8 alkyl； provided that at least one of R<；3>；, R<；4>；, and R<；5>； is not hydrogen) or a salt of the compound； and a PPAR- delta activator which contains the compound or salt as the active ingredient.
