Vitamin D metabolism inhibitor

摘要

This invention provides a novel vitamin D derivative, namely a 24-oxime derivative of vitamin D3, and a process for its preparation. The compound of this invention is an effective inhibitor of vitamin D-25-hydroxylation and markedly suppresses the formation of the physiologically active vitamin D metabolites. The compound would thus find use as an effective antagonist of vitamin D activation, and for treating hypercalcemic conditions resulting from metabolic, bone, or neoplastic diseases, or from vitamin D intoxication.