NEW 3,5-DIHYDROXY CARBOXYLIC ACIDS AND DERIVATIVES THEREOF,A PROCESS FOR THE PREPARATION THEREOF,THE USE THEREOF AS PHARMACEUTICALS,PHARMACEUTICAL PRODUCTS AND INTERMEDIATES

摘要

3,5-Dihydroxycarboxylic acids and their derivatives of the formula I …… and the corresponding lactones of the formula II …… in which R<1>, R<2>, R<3>, R<4> and X-Y have the meanings given, process for the preparation of these compounds, their use as medicines and pharmaceutical compositions are described. …Novel intermediates for the preparation of the compounds of the formulae I and II are additionally described.