abstract |
Disclosed is a compound which has an intestinal phosphate transporter (NPT-IIb) inhibition activity and is useful as an active ingredient for a therapeutic agent and/or a prophylactic agent for hyperphosphatemia. A tetrahydrobenzothiophene compound represented by formula (I) has an NPT-IIb inhibition activity and can be used as a prophylactic agent and/or a therapeutic agent for hyperphosphatemia. (In the formula, R |