2-Phenyl-imidazo[4,5-c]pyridinones useful as cardiotonic agents

摘要

Compounds of the formula <IMAGE> wherein one of A and B is methenyl (-CH=) and the other is carbonyl; R1 is (alkyl of 1 to 3 carbon atoms)mercapto, (alkyl of 1 to 3 carbon atoms)sulfinyl or (alkyl of 1 to 3 carbon atoms)sulfonyl; and R2 is alkoxy of 1 to 3 carbon atoms; tautomers thereof, and non-toxic, pharmacologically acceptable acid addition salts thereof. The compounds are useful as cardiotonics.