| abstract |
The subject of the invention is novel esters derived from 20-oxo 17alpha, 21-dihydroxy pregnane of formula (III '): (CF DRAWING IN BOPI) where in particular R'1 is hydrogen or methyl, R'2 is methyl or ethyl and the rings A, B, C and D optionally carry one or more double bonds and are optionally substituted by hydroxy, keto, halogen, methyl, ethyl, methoxy, ethoxy, vin le or allyl, intermediates in the synthesis of therapeutically active compounds. |