Compounds having the formula I wherein
wherein R
1
, R
2
and R
3
are as defined herein are Hepatitis C virus NS5b polymerase inhibitors with improved bioavailability. Also disclosed are compositions and methods for treating an HCV infection and inhibiting HCV replication.
Compounds having the formula (I) wherein R1, R2, R3, R4a' R4b' R4c', R5, R6, R9 and n are as defined herein are Hepatitis C virus NS5b polymerase inhibitors. Also disclosed are compositions and methods for treating an HCV infection and inhibiting HCV replication.