DERIVATIVES IN THE VITAMIN D SERIES MODIFIED IN THE 20TH POSITION, A METHOD OF PREPARING SUCH DERIVATIVES, INTERMEDIATES USED IN THIS METHOD, PHARMACEUTICAL PREPARATIONS CONTAINING THE DERIVATIVES AND THEIR USE IN THE PREPARATION OF DRUGS

摘要

The invention concerns vitamin D derivatives, modified in the 20th position, of general formula (I), in which Z is H, OH or C1-9 alkanoyl; X is H or both X's together mean an exocyclic methylene group; Y is H, C1-9 alkanoyl or arylcarbonyl; and meanings of other substituents are given in the claims; a method of preparing them; intermediates, pharmaceuticals containing said derivatives and their use for the preparation of medicaments.