A biocompatible polymer constituted by a sequence of identical or different components of the general formula (I): A
a
X
x
Y
y
, in which A represents a monomer, X represents a carboxyl group fixed on a monomer A, Y represents a sulfate or sulfonate group fixed on a monomer A; a represents the number of monomers A, x represents the substitution rate of the set of monomers A by the groups X, y represents the substitution rate of the set of monomers A by the groups Y. The invention also pertains to the pharmaceutical or diagnostic compositions containing at least one polymer of general formula (I).
                            一种
生物相容性聚合物,由通式(I)相同或不同的组分序列构成:A
a
X
x
Y
y
其中,A 代表单体,X 代表固定在单体 A 上的羧基,Y 代表固定在单体 A 上的
硫酸基或
磺酸基;a 代表单体 A 的数量,x 代表一组单体 A 被基团 X 取代的比率,y 代表一组单体 A 被基团 Y 取代的比率。 本发明还涉及含有至少一种通式 (I) 聚合物的药物或诊断组合物。