Armour Pharmaceutical Company

Carroll M Smith

Jay K Seyler

John Lawrence Hughes

Compounds having the structure: ##SPC1## In which R.sub.1 and R.sub.2 are alkoxy groups of one to four carbon atoms, R.sub.3 and R.sub.4 each is hydrogen or an alkoxy group of one to four carbon atoms, and R.sub.5 and R.sub.6 each is an alkyl group of one to four carbon atoms or an arylalkyl group such as benzyl or R.sub.5 taken with R.sub.6 and N are pyrrolidinyl, piperidino, or morpholino groups and the pharmaceutically acceptable salts thereof and processes for preparing these compounds. These compounds are useful as vasodilators.

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Park Forest, IL, United States of America

Carroll M Smith