Fused-ring compounds and use thereof as drugs

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...

Reexamination Certificate

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Details

C548S305100, C548S304100, C548S253000, C548S181000, C514S234500, C514S381000, C514S254080, C514S378000, C514S338000, C514S365000

Reexamination Certificate

active

07112600

ABSTRACT:
The present invention provides a fused ring compound of the following formula [I] wherein each symbol is as defined in the specification, a pharmaceutically acceptable salt thereof, and a therapeutic agent for hepatitis C, which contains this compound. The compound of the present invention shows an anti-hepatitis C virus (HCV) action based on the HCV polymerase inhibitory activity, and is useful as a therapeutic agent or prophylactic agent for hepatitis C.

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