THE INVENTION RELATES TO THE COMPOUND OF GENERAL FORMULA (I) IN WHICH R REPRESENTS A GROUP CHOSEN FROM PYRAZOLYL, IMIDAZOLYL, TRIAZOLYL, OXAZOLYL, OXADIAZOLYL, THIAZOLYL, ISOTHIAZOLYL, THIADIAZOLYL AND TETRAZOLYL, THIS GROUP POSSIBLY BEING SUBSTITUTED WITH ONE OR MORE GROUPS CHOSEN FROM HALOGEN ATOMS AND (CI-C6) ALKYL, (C1-C6)ALKOXY, TRIFLUOROMETHOXY, TRIFLUOROMETHYL, NITRO, CYANO, HYDROXYL, AMINO, (C1-C6)ALKYLAMINO AND DI(C1-C6)ALKYLAMINO GROUPS; THE CARBON-CARBON BOND BETWEEN POSITIONS 3 AND 4 OF THE AZABICYCLOOCTANE RING IS A SINGLE OR DOUBLE BOND; IN THE FORM OF BASE OR OF ACID-ADDITION SALT, AND ALSO IN THE FORM OF HYDRATE OR SOLVATE.