The present invention provides a polysaccharide-magnetic metal oxide complex consisting of a polysaccharide derivative obtained by carboxyalkyl-etherifying and unsubstituted or substituted aminoalkyl-etherifying a polysaccharide (the above carboxy group and/or amino group may be of a salt form) and a magnetic metal oxide. The above complex has a slow blood clearance and a low toxicity and is useful as a nuclear magnetic resonance imaging contrast medium.
本发明提供了一种
多糖-磁性金属氧化物复合物,由羧基烷基醚化和未取代或取代
氨基烷基醚化
多糖(上述羧基和/或
氨基可以是盐形式)得到的
多糖衍
生物和磁性金属氧化物组成。上述复合物的血液清除速度慢,毒性低,可用作核磁共振成像造影剂。