摘要 |
<p>The invention relates to the products of formula: <IMAGE> in which: R1 =, in particular, <IMAGE> or <IMAGE> Rb and Rc = H or acyl A and A' =, in particular H, alkali metal equivalent, aminated organic base, readily cleavable ester group, or CO2A represents CO2<(-)> to a process for their preparation, to their use as medicaments, to compositions containing them and to the new intermediates obtained.</p> |