COMPOUND INHIBITING IN VIVO PHOSPHORUS TRANSPORT AND MEDICINE CONTAINING THE SAME

摘要

A compound which effectively lowers the phosphorus concentration in blood serum and hence can effectively prevent or cure diseases caused by an increase in the phosphorus concentration in blood serum. It is a compound represented by the formula (I), a pharmaceutically acceptable salt thereof, or a solvate thereof. (In the formula, A represents an optionally substituted, 5- to 9-membered, unsaturated carbocycle part or 5- to 9-membered, unsaturated heterocycle part; --- represents a single bond or double bond; R<5> represents optionally substituted aryl, etc.; Z represents -N=CHR<6>R<7>, etc.; R<6> and R<7> each represents hydrogen, optionally substituted alkyl, optionally substituted aryl, etc.; and R<101> and R<102> in combination represent =O and R<103> and R<104> each represents hydrogen, or R<101> and R<104> in combination represent a bond and R<102> and R<103> in combination represent a bond.)