Abstract: Compounds of the formula ##STR1## wherein R.sub.1 is hydrogen, trifluoromethyl, alkyl of 1 to 5 carbon atoms, mercapto, lower alkyl-mercapto, phenyl, fluoro-phenyl, tolyl, hydroxy-phenyl, methylmercapto-phenyl, methylsulfinyl-phenyl, methylsulfonyl-phenyl, dimethylamino-phenyl, or mono-, di- or tri-methoxy-substituted phenyl;A is hydrogen or, together with B, a double bond,B is hydrogen, alkyl of 1 to 3 carbon atoms or, together with A, a double bond;C is, together with R.sub.2, a double bond, or, together with R.sub.3, oxygen;R.sub.2 is hydrogen, alkyl of 1 to 3 carbon atoms or, together with C, a double bond; andR.sub.3 is chlorine, methylamino, morpholino, 4-methylpiperazino or, when R.sub.2 is hydrogen or alkyl of 1 to 3 carbon atoms, together with C, oxygen;And non-toxic, pharmacologically acceptable acid addition salts thereof; the compounds as well as the salts are useful as hypotensives, antithrombotics and cardiotonics.

Abstract: Compounds of the isomeric formulas ##SPC1##WhereinR.sub.1 is alkoxy of 1 to 4 carbon atoms, allyloxy, benzyloxy, methoxy-ethoxy, methylthio, methylsulfinyl, methylsulfonyl or methylsulfinylethoxy,R.sub.2 is hydrogen, hydroxyl, methyl, methoxy, ethoxy, fluorine, chlorine, (alkyl of 1 to 4 carbon atoms)-thio, (alkyl of 1 to 4 carbon atoms)-sulfinyl, (alkyl of 1 to 4 carbon atoms)-sulfonyl, dimethylamino or Z-A-O-whereA is alkylene of 2 to 3 carbon atoms, andZ is chlorine, hydroxyl, methylthio, ethylthio, methylsulfinyl; ethylsulfinyl, methylsulfonyl, ethylsulfonyl, methylamino, dimethylamino, diethylamino, phenethylamino, N-methyl-phenethylamino or N-methyl-dimethoxyphenethylamino,R.sub.3 is hydrogen or methoxy,Or any two of R.sub.1, R.sub.2 and R.sub.3 together are methylenedioxy, andR.sub.5 is hydrogen, chlorine or methyl,And non-toxic, pharmacologically acceptable acid addition salts thereof; the compounds as well as the salts are useful as cardiotonics, anticoagulants and for altering the blood pressure.