N-substituted derivatives azabicycloheptane, their preparation and use.

3-azabicyclo derivatives [3.2.0] heptane N-substituted formula I ** (Formula) ** wherein R1 is fluorine or chlorine, R2 and R3 are hydrogen or alkyl having 1 to 3 carbon atoms and R4 It represents chlorine, methyl, nitro or amino, and their salts with physiologically tolerated acids.