A compound or a pharmacologically acceptable salt thereof selected from the group consisting of: 2-methyl-4-[3-(3-methylbenzothiophen-2-yl)propionyl]phenoxyacetic acid, 2-methyl-2-[2-methyl-4-[3-(3-methylbenzothiophen-2-yl)-propionyl]phenoxy]propionic acid, 2-methyl-4-[3-[3-methyl-5-(trifluoromethyl)benzothiophen-2-yl]propionyl]phenoxyacetic acid, 2-methyl-2-[2-methyl-4-[3-[3-methyl-5-(trifluoromethyl)-benzothiophen-2-yl]propionyl]phenoxy]propionic acid, 2-methyl-4-[3-[3-methyl-6-(trifluoromethyl)benzothiophen-2-yl]propionyl]phenoxyacetic acid, 2-methyl-2-[2-methyl-4-[3-[3-methyl-6-(trifluoromethyl)-benzothiophen-2-yl]propionyl]phenoxy]propionic acid, 3-[4-[3-[3-methyl-6-(trifluoromethyl)benzothiophen-2-yl]-propionyl]-2-methylphenyl]propionic acid, 3-[4-[3-[3-ethyl-6-(trifluoromethyl)benzothiophen-2-yl]propionyl]-2-methylphenyl]propionic acid, 3-[2-methyl-4-[3-[3-propyl-6-(trifluoromethyl)benzothiophen-2-yl]propionyl]phenyl]propionic acid, 3-[2-methyl-4-[3-[3-butyl-6-(trifluoromethyl)benzothiophen-2-yl]propionyl]phenyl]propionic acid, 3-[2-methyl-4-[3-[3-isobutyl-6-(trifluoromethyl)benzothiophen-2-yl]propionyl]phenyl]propionic acid, 3-[2-methyl-4-[3-[3-isopropyl-6-(trifluoromethyl)benzothio-phen-2-yl]propionyl]phenyl]propionic acid, 3-[4-[1-hydroxyimino-3-[3-isopropyl-6-(trifluoromethyl)benzo-thiophen-2-yl]propyl]-2-methylphenyl]propionic acid, 3-[4-[1-[2-[3-isopropyl-6-(trifluoromethyl)benzothiophen-2-yl]ethyl]vinyl]-2-methylphenyl]propionic acid, 4-[3-[3-isopropyl-6-(trifluoromethyl)benzothiophen-2-yl]propionyl]-2-methylphenoxyacetic acid, 4-[1-hydroxyimino-3-[3-isopropyl-6-(trifluoromethyl)benzothio-phen-2-yl]propyl]-2-methylphenoxyacetic acid, 4-[3-[3-isopropyl-6-(trifluoromethyl)benzothiophen-2-yl]-1-methoxyiminopropyl]-2-methylphenoxyacetic acid, and 4-[1-benzyloxyimino-3-[3-isopropyl-6-(trifluoromethyl)benzo-thiophen-2-yl]propyl]-2-methylphenoxyacetic acid; 5-hydroxy-2-methyl-4-[3-[3-propyl-6-(trifluoromethyl)benzo-thiophen-2-yl]propionyl]phenoxyacetic acid; and 5-hydroxy-4-[1-hydroxyimino-3-[3-propyl-6-(trifluoromethyl)-benzothiophen-2-yl]propyl]-2-methylphenoxyacetic acid. 2-methyl-4-[3-(3-methylbenzothiophen-2-yl)propionyl]phenoxyacetic acid, 2-methyl-2-[2-methyl-4-[3-(3-methylbenzothiophen-2-yl)-propionyl]phenoxy]propionic acid, 2-methyl-4-[3-[3-methyl-5-(trifluoromethyl)benzothiophen-2-yl]propionyl]phenoxyacetic acid, 2-methyl-2-[2-methyl-4-[3-[3-methyl-5-(trifluoromethyl)-benzothiophen-2-yl]propionyl]phenoxy]propionic acid, 2-methyl-4-[3-[3-methyl-6-(trifluoromethyl)benzothiophen-2-yl]propionyl]phenoxyacetic acid, 2-methyl-2-[2-methyl-4-[3-[3-methyl-6-(trifluoromethyl)-benzothiophen-2-yl]propionyl]phenoxy]propionic acid, 3-[4-[3-[3-methyl-6-(trifluoromethyl)benzothiophen-2-yl]-propionyl]-2-methylphenyl]propionic acid, 3-[4-[3-[3-ethyl-6-(trifluoromethyl)benzothiophen-2-yl]propionyl]-2-methylphenyl]propionic acid, 3-[2-methyl-4-[3-[3-propyl-6-(trifluoromethyl)benzothiophen-2-yl]propionyl]phenyl]propionic acid, 3-[2-methyl-4-[3-[3-butyl-6-(trifluoromethyl)benzothiophen-2-yl]propionyl]phenyl]propionic acid, 3-[2-methyl-4-[3-[3-isobutyl-6-(trifluoromethyl)benzothiophen-2-yl]propionyl]phenyl]propionic acid, 3-[2-methyl-4-[3-[3-isopropyl-6-(trifluoromethyl)benzothio-phen-2-yl]propionyl]phenyl]propionic acid, 3-[4-[1-hydroxyimino-3-[3-isopropyl-6-(trifluoromethyl)benzo-thiophen-2-yl]propyl]-2-methylphenyl]propionic acid, 3-[4-[1-[2-[3-isopropyl-6-(trifluoromethyl)benzothiophen-2-yl]ethyl]vinyl]-2-methylphenyl]propionic acid, 4-[3-[3-isopropyl-6-(trifluoromethyl)benzothiophen-2-yl]propionyl]-2-methylphenoxyacetic acid, 4-[1-hydroxyimino-3-[3-isopropyl-6-(trifluoromethyl)benzothio-phen-2-yl]propyl]-2-methylphenoxyacetic acid, 4-[3-[3-isopropyl-6-(trifluoromethyl)benzothiophen-2-yl]-1-methoxyiminopropyl]-2-methylphenoxyacetic acid, and 4-[1-benzyloxyimino-3-[3-isopropyl-6-(trifluoromethyl)benzo-thiophen-2-yl]propyl]-2-methylphenoxyacetic acid; 5-hydroxy-2-methyl-4-[3-[3-propyl-6-(trifluoromethyl)benzo-thiophen-2-yl]propionyl]phenoxyacetic acid; and 5-hydroxy-4-[1-hydroxyimino-3-[3-propyl-6-(trifluoromethyl)-benzothiophen-2-yl]propyl]-2-methylphenoxyacetic acid.