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US 4,904,664 AGranted
Benzene compounds having two pyridazinone substituents
AssigneeSmith Kline & French Laboratories Limited
InventorsHunter D. Prain, Brian H. Warrington
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Abstract
The invention relates to pyridazinone derivatives which have inotropic, vasodilator and bronchodilator activity. The compounds of the invention are described by formula (I): ##STR1## wherein: R.sup.1 is hydrogen or methyl; R.sup.2 is hydrogen or methyl; and represent double or single bonds; and the benzene ring is para- or meta-substituted; and pharmaceutically acceptable salts thereof.
Claims18
A compound of the formula (I):
- ##STR13## or a pharmaceutically acceptable salt thereof, wherein R.sup.1 is hydrogen or methyl;
- R.sup.2 is hydrogen or methyl;
- and represent double or single bonds;
- and the benzene ring is para- or meta-substituted.
1 more element
Dependencies are inferred from the claim text.