| 摘要 |
<p>. The present invention relates to a process for the preparation of new compounds of the general formula : (I) in which : R1 is selected from hydrogen and alkoxy having 1-7 carbon atoms, R2 is hydrogen, n is selected from zero and 1, X and Y are hydrogen atoms, and Z is hydroxy, or Y and Z taken together represent an oxygen atom, or, when n = 1, X and Z may represent a single bond, A represents an amino radical, and a pharmaceutically acceptable acid addition salt thereof. These compounds are useful for the treatment of asthma.</p> |
