Arzneitmittelwerk Dresden G.m.b.h.

Karl Gewald

Hans-Joachim Lankau

Klaus Unverferth

Manfred Menzer

Harry Schafer, Deceased

Compounds having anticonsulive activity, of the formula 1 ##STR1## in which X is hydrogen, a C.sub.1-4 -alkyl, C.sub.1-4 alkoxy, trifluoromethyl, or halogen residue, R.sup.1 and R.sup.2 are independently of each other C.sub.1-4 -alkyl, C.sub.2-4 hydroxyalkyl, cycloalkyl or heteroalkyl, or R.sup.1 and R.sup.2 are together a C.sub.2-6 alkylene reside in which a--CH.sub.2 --group is optionally replaced by oxygen, nitrogen or sulfur, m is 0 or 1, and n is 0 or a cardinal number from 1 to 5, and their pharmaceutically acceptable salts. The application also relates to a process for making the compound of formula (I).

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Dresden, Germany

Karl Gewald