Abstract: According to the present invention, a compound represented by the following formula (I) having a superior PPAR? agonist action and concurrently showing a hypolipidemic action can be provided, and further, a compound useful as a synthetic intermediate for the compound can be provided.
Abstract: Compounds represented by the ?-amino acid derivative or a pharmaceutically acceptable salt thereof of the present invention have a therapeutic effect due to a DPP-IV inhibitory action and useful as pharmaceutical agents for the treatment and/or prophylaxis of diseases relating to a DPP-IV inhibitor.