POLY(AMINO ACID) COMPOUND HAVING INHIBITORY ACTIVITY ON ABSORPTION OF PHOSPHORUS AND PHOSPHORUS ABSORPTION INHIBITOR

摘要

Disclosed is a water-soluble poly(amino acid) compound represented by the general formula (I) or a salt thereof. The compound is a novel water-soluble compound having an inhibitory effect on the absorption of phosphorus in vivo. (I) wherein R¹ to R⁷ independently represent a hydrogen atom, Rx-[A]p- [wherein A represents a linking group; p represents a number of 0 or 1; and Rx represents an aminocarboxylic acid residue or the like] or the like; X and Y independently represent -N- or -CH-; m and n independently represent an integer of 2 to 7; when m is 2, X is -CH-; when m is equal to or larger than 3, multiple X-R6 groups may be the same as or different from each other but it is impossible that multiple N-R6 groups are present adjacent to each other; when n is 2, Y is -CH-; and when n is equal to or larger than 3, multiple Y-R7 groups may be the same as or different from each other but it is impossible that multiple N-R7 groups are present adjacent to each other.