24-Oxa derivatives in the vitamin D series

摘要

New 24-oxa derivatives in the vitamin D series of general formula I are described <IMAGE> (I) in which R1, R2 and R5, independently of one another, mean a hydrogen atom or an acyl group with 1 to 9 carbon atoms, R3 means a hydrogen atom or a linear or branched alkyl group with 1 to 4 carbon atoms and R4 means a hydrogen atom each or a linear or branched alkyl group each with 1 to 4 carbon atoms. Pharmaceutical preparations which contain these compounds are also disclosed.