New oestrane derivatives intended for topical pharmacological application, and process for preparing them

摘要

The present invention relates to new oestrane derivatives intended for topical pharmacological application, as well as to a process for preparing them. In the new oestrane derivatives, the oestrane active principle is grafted onto a carrier molecule by establishing, between the latter and a hydroxyl group at position 3 and/or 17 of the oestrane skeleton of the aforementioned active principle, a carbonate bond: which is labile to hydrolysis.r