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During a 20-year collaboration the laboratories of UGent and KU Leuven have developed different series of Vitamin D analogs characterized by structural modifications in the central CD-ring system. Modifications have first involved the introduction of substituents at C11 and the epimerization at C14, and subsequently more drastic changes consisting in both ring deletion and enlargement relative to...
In the context of our ongoing study of vitamin D structure–function relationships and in an attempt to obtain a better dissociation of their prodifferentiating (HL-60) and/or antiproliferative (MCF-7) activities and their calcemic activity, further 20-epi and 14-epi modifications were made to three trans-decalin CD-ring analogs of 1,25-dihydroxyvitamin D 3 , the hormonally active metabolite...
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