Compounds of the formula ##STR10## and the pharmaceutically acceptable acid addition salts thereof wherein R2 and R3 together with N is an azobicycloalkyl or phenyl or hydroxyl substituted azabicycloalkyl having 6-9 carbon atoms and having at least 5 atoms in each ring; Ar1 and Ar2 are phenyl, halo-substituted phenyl, (lower alkyl) substituted phenyl, pyridyl, thienyl or furyl; and Ar3 is phenyl,