A process for the treatment of anxiety and tension, which comprises administering to a patient in need therefor an anxiolytically effective amount of a compound of the formula ##STR1## wherein X is hydrogen, a C.sub.1-4 alkyl, C.sub.1-4 alkoxy, trifluoromethyl residue, or halogen; R.sup.1 and R.sup.2 are independently of each other a C.sub.1-4 alkyl, cycloalkyl, C.sub.2-4 hydroxyalkyl, or heteroalkyl residue, or R.sup.1 and R.sup.2 together form a C.sub.2-6 alkylene residue in which one --CH.sub.2 -- group can be replaced by oxygen, nitrogen or sulfur; n is 0 or 1, and m is 0 or a cardinal number from 1-5, or a pharmaceutically acceptable salt of the compound.