VITAMIN D DERIVATIVES WITH CYCLIC SUBSTRUCTURES IN THE SIDE CHAINS, METHOD AND INTERMEDIATES FOR THEIR PRODUCTION AND THEIR USE IN THE PREPARATION OF MEDICAMENTS
1. Vitamin D derivatives of general formula I, in which Y1 and Y2, independently of one another, each mean a hydrogen atom or a group -C(O)R5, and Y3 means a hydrogen atom or a hydroxy group, a halogen atom, a group -OC(O)R5 or an -OR5 group, whereby R5 stands for a saturated C1-C12 alkyl radical, a...
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