Vitamin D derivatives with carbo- or heterocyclic substituents at C-25, process for their production, intermediate products and use for the production of pharmaceutical agents

The invention relates to vitamin D derivatives of formula (I), processes for the production thereof and uses thereof: ##STR1## wherein Y.sub.1, Y.sub.2, R.sub.1 --R.sub.6, Q and Z are as defined herein.
Die Erfindung bezieht auf Ableitungen des Vitamins D von Formel (i), von Prozessen für die Produktion davon und von Gebrauch davon: ## STR1 ## worin Y.sub.1, Y.sub.2, R.sub.1 -- R.sub.6, Q und Z sind, wie hierin definiert.

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