The present invention relates to Cyclic Phosphonate Substituted Nucleoside Derivatives of Formula (I): (structure) and pharmaceutically acceptable salts thereof, wherein B, X, R1, R2 and R3 are as defined herein, as well as to compositions and methods of using the Cyclic Phosphonate Substituted Nucleoside Derivatives for treating or preventing HCV infection in a patient.
本发明涉及公式(I)中的环
磷酸酯取代核苷衍
生物(结构)及其药用盐,其中B、X、R1、R2和R3的定义如本文所述,以及使用该环
磷酸酯取代核苷衍
生物治疗或预防患者HCV感染的组合物和方法。