19-nor steroids substituted in position 11 , preparation method and intermediates, application as medicines and pharmaceutical compositions containing them

The present invention concerns 19-nor steroid compounds, substituted in position 11 , their preparation process and intermediates, their application as medicines and the pharmaceutical compositions containing them. A compound selected from the group consisting of the compounds of the formula wherein the substituents are defined as in the specification and their addition salts with non-toxic, pharmaceutically acceptable acids and bases having estrogenic activity at the bone level but little or no endometrial hyperplasia activity nor any activity for proliferation of mammary tumors.