| abstract |
The present invention is concerned with new derivatives of the cortisone series having in particular a corticoidal, anti-phlogistic and anti-anaphylactic activity. n The compounds of the present invention are represented by the formula: ##STR1## in which: St is a radical selected from 9-chloro-11β,17,21-trhihydroxy-16β-methyl-pregna-1,4 diene-3,20 dione and 9-fluoro-11β,17,21 -trihydroxy-16-α-methyl-pregna-1,4 diene-3,20 dione, the ester linkage being at position 21 of the steroid group. |