| 摘要 |
The invention relates to new compounds of formula: <IMAGE> in which n represents a number which may range from 1 to 5, A represents an oxygen or sulphur atom or a group <IMAGE>, R being a hydrogen atom or an alkyl radical containing 1 to 4 carbon atoms, X and X', which are identical or different, represent a hydrogen atom, an alkyl radical containing 1 to 4 carbon atoms, an alkoxy radical containing 1 to 4 carbon atoms, a halogen atom, a hydroxyl, trifluoromethyl, nitro, amino, monoalkyl or dialkylamino radical, it being possible for the said compounds of the formula to be in all the possible enantiomeric and diastereoisomeric forms and in the form of addition salts with acids or quaternary ammonium salts. The invention also relates to the process for preparing the compounds, their application as medicinal products and the pharmaceutical compositions containing them.
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