Glaxo Inc.

Terrence P Kenakin

Thomas N Wheeler

Joel E Shaffer

Compounds of the following formula (I): ##STR1## where R.sup.1 and R.sup.2 are alkyl or cycloalkyl, which may be substituted, R.sup.4 is aryl such as phenyl which may be substituted, L is a direct bond or an oxygen containing linking group, R is a hydrogen, alkyloxy, alkyl, halogen or haloalkyl and Het is a pyridinyl or pyridazinyl group. The compounds can be used antihypertensives or myocardial relaxants. Also part of the invention are pharmaceutical compositions, intermediates and methods of synthesis.

Dihydropyridine vasodilators agents

Pyridazinones of the following formula (I): ##STR1## where R.sup.1 -R.sup.4 are a variety of substituents and L is a linking group, a pharmaceutical composition for treating congestive heart failure, novel intermediates, methods for such treatment and processes for preparing compounds of formula (I).

Substituted methoxyphenyl-4,5 dihydro-3(2H)-pridazinones having

Pyridones of formula (I) for treating congestive heart failure: ##STR1## wherein: R.sup.1 and R.sup.2 are a variety of phenyl substituents, L is a divalent alkylene linking group. Pharmaceutical composition, methods for their use in treating cardiovascular conditions, processes used in synthesis and intermediates used in such processes.

Pyridone nitriles useful in treating cardiovascular disease

Dihydropyridine vasodilator agents

Pyridazinones having cardiotonic and beta blocking activities

Pyridones of formula (I) for treating congestive heart failure: ##STR1## wherein: R.sup.1 and R.sup.2 are a variety of phenyl substituents, L is a divalent alkylene or amide containing alkylene linking group. Pharmaceutical composition, methods for their use in treating cardiovascular conditions, processes used in synthesis and intermediates used in such processes.

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Durham, NC, United States of America

Terrence P Kenakin