| abstract |
Vitamin D derivatives having a modification at position 20 of formula (I) wherein Z is hydrogen, OH or C 1-9 alkanoyl; X is hydrogen or both X together form an exocyclic methylene group, Y is hydrogen, C 1-9 alkanoyl or arylcarbonyl, and the meaning of other substituents is set forth in the claims, process for their preparation, intermediates for the process, pharmaceutical preparations containing these and their use in the manufacture of liečiv.ŕ |