Halogenated pyrimidine nucleoside derivatives with improved aqueous solubility and methods of enhancing the concentration of drugs in malignant tumors and promoting uniform distribution of the drug throughout the tumor. These basic and hydrophilic ester prodrugs are designed to undergo conversion to the active drug by an intramolecular chemical reaction at practical rates under physiological conditions.
                            氯代
嘧啶核苷衍
生物具有改善的
水溶性,以及增强药物在恶性肿瘤中的浓度和促进药物在整个肿瘤中的均匀分布的方法。这些基本的亲
水性酯前药被设计成在生理条件下以实际速率通过分子内
化学反应转化为活性药物。