A compound represented by formula (1):
wherein
b represents an integer of 1 to 5;
X represents -NH- or -CO-;
Z represents a group represented, for example, by formula (Z-1);
R1 represents a hydrogen atom or (AB)m;
AB represents a particular amino acid residue, and when there is a plurality of ABs, each AB may be the same as or different from each other and ABs are bonded to each other via an amide bond;
m represents an integer of 1 to 9;
R2 represents a hydroxy group or (AC)g;
AC represents a particular amino acid residue, and when there is a plurality of ACs, each AC may be the same as or different from each other and ACs are bonded to each other via an amide bond; and
g represents an integer of 1 to 9,
or a salt thereof.
式 (1) 所代表的化合物:
其中
b 代表 1 至 5 的整数;
X 代表-NH-或-CO-;
Z 代表例如由式(Z-1)代表的基团;
R1 代表氢原子或 (AB)m;
AB 代表特定的
氨基酸残基,当有多个 AB 时,每个 AB 可彼此相同或不同,并且 AB 通过酰胺键彼此结合;
m 代表 1 至 9 的整数;
R2 代表羟基或 (AC)g;
AC 代表特定的
氨基酸残基,当存在多个 AC 时,每个 AC 可以相同或不同,AC 通过酰胺键相互结合;以及
g 代表 1 至 9 的整数、
或其盐。