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

C544S010000, C544S012000, C514S223200

Reexamination Certificate

active

07425552

ABSTRACT:
The invention is directed to pyridazinone compounds of Formula I and pharmaceutical compositions containing compounds of Formula Iwherein R1and R2are independently H, alkyl, cycloalkyl, aryl, or heterocyclyl; and Ring A is 5 or 6-membered aryl or heterocyclyl. The invention also encompasses methods of using a compound of Formula I in the treatment of hepatitis C virus infections.

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