[EN] PREPARATION OF 24 ALKYL ANALOGS OF CHOLECALCIFEROL AND NON-RACEMIC COMPOUNDS [FR] PREPARATION D'ANALOGUES ALKYL-24 DE CHOLECALCIFEROL ET DE COMPOSES NON RACEMIQUES
[EN] PREPARATION OF 24 ALKYL ANALOGS OF CHOLECALCIFEROL AND NON-RACEMIC COMPOUNDS [FR] PREPARATION D'ANALOGUES ALKYL-24 DE CHOLECALCIFEROL ET DE COMPOSES NON RACEMIQUES