NEW PREGNA-1,4-DIENE-3,20-DIONE-16-17-ACETAL-21 ESTERS, PROCESS FOR THEIR PREPARATION, COMPOSITION, AND METHODS FOR THE TREATMENT OF INFLAMMATORY CONDITIONS

摘要

The present invention relates to compounds of the formula: in which X1 and X2 correspond to H or F without distinction; R1 represents the following radicals: and R2 represents the radicals in the form of an R epimer, an S epimer, or a stereoisomeric mixture of the R and S epimers in terms of the orientation of the substituents on the carbon atom at position 22, novel intermediates and a method of their preparation by hydrolysis-ketalization, and use of such compounds as drugs and/or therapeutic agents.