Pyridazinone derivatives
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United States of America Patent
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Jun 22, 1993
Issued Date -
N/A
app pub date -
Sep 27, 1991
filing date -
Jun 19, 1989
priority date (Note) -
Expired
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Abstract
A pyridazinone compound represented by the general formula ##STR1## wherein Ar is ##STR2## in which R.sup.1, R.sup.2 and R.sup.3 may be identical or different, and each represents a hydrogen atom, a lower alkyl group, a trifluoromethyl group, a halogen atom, a cyano group or a nitro group, and R.sup.4 represents a hydrogen atom, a lower alkoxy group, or a lower alkyl group substituted by a lower alkoxy group or a carbamoyl group, and C* is an assymmetric carbon atom, or a salt thereof. This compound is useful for the treatment of diseases of the circulatory system.
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