Pyrro[1,2-b]pyridazinone compounds

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

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Details

C514S223200, C544S010000, C544S012000

Reexamination Certificate

active

07462611

ABSTRACT:
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 R4is selected fromRing A is 5 or 6- membered aryl or heterocyclyl, and the remaining substituents are defined herein.

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