Pyrazinyl and pyridazinyl ethers
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United States of America Patent
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Jan 21, 1992
Issued Date -
N/A
app pub date -
Oct 30, 1990
filing date -
Aug 4, 1987
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Expired
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Abstract
Novel ethers of formula ##STR1## their heteroaromatic N-oxides, and the pharmaceutically acceptable acid additions of the compounds of formula (I) and their N-oxides possess 5-HT.sub.3 -antagonistic activity. In the formula ##STR2## represents an optionally substituted heteroaryl group containing a hetero atom X and -B represents a saturated azabicyclic ring such as quinuclidyl or tropanyl.
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