The present invention provides a glycosaminoglycan derivative in which a group derived from glycosaminoglycan and a group derived from a physiologically active substance having at least one of a carboxy group and a hydroxy group are coupled by covalent bond with a spacer therebetween, in which the spacer is selected in accordance with the decomposition rate of the covalent bond to the group derived from the physiologically active substance.
本发明提供了一种糖胺聚糖衍
生物,其中来自糖胺聚糖的基团和来自具有至少一个羧基和一个羟基的生理活性物质的基团通过共价键结合在一起,中间有一个间隔物,其中间隔物是根据共价键与来自生理活性物质的基团的分解率来选择的。