6-Oxo-pyridazinyl compounds.

摘要

Compounds of the formula (I) :
<CHEM>
and pharmaceutically acceptable salts are described wherein R<1> is hydrogen or methyl; R<2> is hydrogen or methyl; .... and ---- represent double or single bonds; and the benzene ring is para- or meta-substituted. These compounds have inotropic and vasodilator properties. Pharmaceutical compositions and methods of use are described.