abstract |
The present invention relates to a 2′-cyano substituted nucleoside derivative of formula (I) and pharmaceutically acceptable salts thereof, wherein A, B, X, R 1 , R 2 and R 3 are as defined herein. Is). The present invention also relates to compositions comprising at least one 2′-cyano substituted nucleoside derivative and methods of using 2′-cyano substituted nucleoside derivatives for treating or preventing HCV infection in a patient. [Chemical 1] |