| 摘要 |
<p>[Problem] To provide a water-soluble hyperbranch polymer which has satisfactory relaxing capability, does not undergo the dissociation of metal ions, and has excellent safety to living bodies and proper levels of water solubility and lipid solubility, and which has wide organ distribution and an effect of being taken into organs and therefore enables the imaging of a wide variety of target organs and a wide variety of diseases and can be used as a novel MRI imaging agent. [Solution] A hyperbranch polymer having a graft chain at the terminal of the molecule thereof, wherein both a segment (A) having a moiety capable of exerting paramagnetism and a segment (B) having at least one functional group selected from the group consisting of a carboxyl group, an amino group, a hydroxy group and a sulfo group are contained in the graft chain; and an MRI imaging agent comprising the hyperbranch.</p> |
