| abstract |
The invention concerns the use of carboxylic acid derivatives of formula I (I) in which R means a formyl group, a CO2H group or a residue which can be hydrolysed to form COOH; X means nitrogen or CR14, wherein R14 means hydrogen or, together with R3, forms a 3- to 4-member alkylene or alkenylene chain in each of which a methyl group can be replaced by oxygen; Y means sulphur or oxygen or a single bond; Z means sulphur or oxygen; and the other substituents have the meanings given in the description. These derivatives can be used for preparing medicaments. |