| 摘要 |
<p>The invention relates to new piperazine derivatives of the general formula <IMAGE> I in which R' and R2 each represents 1, 2 or 3 halogen atoms, which may be the same or different, R3 represents a hydrogen atom or 1, 2 or 3 halogen atoms, X represents a hydroxy, C1-4 alkoxy, phenylcarbamoyloxy or C1-4 alkylcarbamoyloxy group, Y represents a hydrogen atom or a C1-3 alkyl group, or X and Y together with the carbon atom to which they are linked represent a carbonyl group, m is 1, 2 or 3, n is 0 or 1, with the proviso that m+n is at most 3, and their acid addition and quaternary ammonium salts. Other features of the invention are processes for the preparation of compounds of formula I, pharmaceutical preparations comprising a compound of formula I.</p> |
