| abstract |
The invention relates to the utilisation of a substance of general formula (I) wherein (A) R1 and R2 are both hydrogen, R3 is halogen, -CF3 is alkoxy with one or two carbon atoms or a halogen substituted alkoxy with one or two carbon atoms and R4 is alkyl with one to four carbon atoms or cycloalkyl with three or four carbon atoms, (B) R1 is hydrogen and R2 and R3 which are the same or different are halogen or -CF3 and R4 is alkyl with one to four carbon atoms or cycloalkyl with three or four carbon atoms, (C) R1 is hydrogen, R2 is alkyl with one or two carbon atoms, R3 is halogen and R4 is alkyl with one to four carbon atoms or cycloalkyl with three or four carbon atoms, (D) R1 is hydrogen, R2 and R3 together are 3',4'-methylendioxy and R4 is alkyl with one to four carbon atoms or cycloalkyl with three or four carbon atoms or the utilisation of a derivative of said formula, whereby said derivative has an open isoxazole ring or a physiologically compatible salt of said formula for producing an agent for the prevention or treatment of virus infections caused by hepatitis B viruses, HI viruses, viruses of the paramyxo group or/and orthomyxo group. |