Pyrazole compositions

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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C514S407000

Reexamination Certificate

active

06962923

ABSTRACT:
Compounds of formulae (IA) and (IB):wherein R1, R2, R3, Ar1and X are as defined above, are endothelin antagonists. The compounds are therefore useful in the treatment of a variety of conditions mediated by endothelin, such as restenosis, renal failure and systemic and pulmonary hypertension.

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