A prodrug according to formula (I) wherein R2 is a residue of a drug, said drug having a hydroxyl group by which the COOR2 group is formed; Z is O or NH; m is 0 or 1; and R3 is an organic moiety comprising a lipophilic group or a residue of a polymer, provided that Z is 0 if the polymer is carboxymethyl dextran. A system includes a plurality of magnetic nanoparticles including a prodrug as described above, a stent and a source of uniform magnetic field capable of producing temporary magnetization of the stent and/or the magnetic nanoparticles. A method of treating a medical condition with a drug includes administering to a patient in need of the drug a prodrug as described above, the prodrug being capable of releasing the drug in the patient after the administration step.
根据公式(I)的专利药物前体,其中R2是药物的残基,所述药物具有通过COOR2基团形成的羟基;Z为O或NH;m为0或1;R3是包含疏
水基团或聚合物残基的有机基团,前提是如果聚合物是羧甲基
葡聚糖,则Z为0。该系统包括多个磁性纳米颗粒,其中包括上述描述的药物前体,支架和能够产生支架和/或磁性纳米颗粒临时磁化的均匀磁场源。用药物治疗医疗状况的方法包括向需要该药物的患者注射上述描述的药物前体,该药物前体在给药步骤后能够在患者体内释放药物。