Compounds of the formula ##SPC1##Wherein ##EQU1## where R.sub.1 is hydrogen, straight or branched aliphatic acyl of 1 to 12 carbon atoms, methoxy-substituted straight or branched aliphatic acyl of 1 to 12 carbon atoms, benzoyl, halo-benzoyl, carbalkoxy of 2 to 7 carbon atoms, carbcycloalkoxy of 4 to 7 carbon atoms, benzyl, methylbenzyl, phenylsulfonyl, halo-phenylsulfonyl, tolylsulfonyl, alkenyl of 2 to 6 carbon atoms, phenyl, trifluoroacetyl, amidino, amido, thioamido, phenoxycarbonyl, benzyloxycarbonyl, methylsulfonyl or--B -- XwhereB is straight or branched alkylene of 1 to 6 carbon atoms, andX is hydrogen, hydroxyl, methoxy, carboxyl, cyano, dimethylaminocarbonyl, morpholino-carbonyl or carbalkoxy of 2 to 6 carbon atoms,R.sub.2 is hydrogen, hydroxyl, alkyl of 1 to 3 carbon atoms, alkoxy of 1 to 3 carbon atoms, alkanoyloxy of 1 to 3 carbon atoms, alkoxycarbonyloxy of 2 to 4 carbon atoms, amino, dimethylamino, morpholino or halogen,R.sub.3 is hydrogen, halogen, hydroxyl, carboxyl, straight or branched alkyl of 1 to 6 carbon atoms, cycloalkyl of 3 to 6 carbon atoms, alkoxy of 1 to 3 carbon atoms, phenyl-alkoxy of 1 to 3 carbon atoms, carbalkoxy of 2 to 4 carbon atoms -- alkoxy of 1 to 3 carbon atoms, carbalkoxy of 2 to 4 carbon atoms, hydroxymethyl, phenyl, phenoxy, amino, pyrrolidino or morpholino,R.sub.4, r.sub.5 and R.sub.6, which may be identical to or different from each other, are each hydrogen, halogen, methyl, hydroxyl, methoxy, cyano, amino, nitro, trifluoromethyl, carboxyl, acetyl or carbalkoxy of 2 to 4 carbon atoms, or any two of R.sub.4, R.sub.5 and R.sub.6 together are methylenedioxy, andX.sub.1 and X.sub.2 are hydrogen or together form a double bond,6-N-oxides thereof, and non-toxic, pharmacologically acceptable acid addition salts thereof; the compounds as well as their salts are useful as anoretics.