The invention is directed to pyrro[1,2-b]pyridazinone compounds and pharmaceutical compositions containing such compounds that are useful in treating infections by hepatitis C virus.
The invention is directed to pyrro[1,2-b]pyridazinone compounds of Formula I and pharmaceutical compositions containing such compounds that are useful in treating infections by hepatitis C virus:
wherein R4 is selected from
Ring A is 5 or 6- membered aryl or heterocyclyl, and the remaining substituents are defined herein.