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Johannes Hartenstein

Gerhard Satzinger

Hartmut Osswald

Edgar Fritschi

Karl Mannhardt

Jurgen Kleinschroth

Gunter Weinheimer

The present invention describes 1,6-naphthyridine derivatives of the general formula: ##STR1## wherein R.sup.1 is an unsubstituted or substituted aromtic or heteroaromatic ring, R.sup.2 is a straight-chained or branched alkyl radical containing up to four carbon atoms or a benzyl radical, R.sup.3 is a hydrogen atom, a straight-chained or branched alkyl radical or an alkoxycarbonyl radical containing up to four carbon atoms, R.sup.4 is a straight-chained or branched alkyl radical containing up to four carbons and R.sup.5 is a carbonyl group or a straight-chained, branched or cyclic alkoxycarbonyl radical which contains up to 17 carbon atoms and optionally also contains an oxygen, sulphur or nitrogen atom; as well as the pharamacologically acceptable salts thereof, which are useful for treating diseases of the blood vessels.

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7801 Stegen-Wittental, Germany

Johannes Hartenstein