Abstract: Compounds of the steroisomeric formulas ##STR1## wherein R.sub.1 and R.sub.2, which may be identical to or different from each other, are each phenyl, substituted phenyl, thienyl or furyl;R.sub.3 is hydrogen or straight or branched alkyl of 1 to 3 carbon atoms; andR.sub.4 is straight or branched alkyl of 1 to 3 carbon atoms; orR.sub.3 and R.sub.4, together with each other and the nitrogen atom to which they are attached, form a piperidino, 4-amino-piperidino, 4-(lower alkylamino)-piperidino, piperazino, 4-(alkyl of 1 to 2 carbon atoms)-piperazino or morpholino radical; and non-toxic, pharmacologically acceptable acid addition salts thereof. The compounds as well as their salts are useful as antidepressants.