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

摘要

A compound selected from the group consisting of the compounds of the formulawherein 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.