4-thio coumarins

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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C514S457000, C549S284000, C549S285000

Reexamination Certificate

active

07148253

ABSTRACT:
4-Thio substituted coumarin derivatives, 4,5-dithio substituted coumarin derivatives, and coumarin dimers are provided, as well as processes for their preparation. The invention also provides a method and composition for the treatment of hepatitis C virus (HCV) by adiministering 4-thio substituted coumarin derivatives, 4,5-dithio substituted coumarin derivatives, and coumarin dimers.

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