Patent AT-E401303-T1: [Translated] METHOD FOR PRODUCING ED-71

Vitamin D derivatives having general formula (1) which are hydroxylated at the 24-position and considered as one of metabolites of physiologically active vitamin D derivatives substituted at the 2 beta -position wherein R1, R2, R3 and R4 are the same or different and each represents hydrogen or a protective group; X and Y represent each H or OR5, provided that Y is OR5 when X is H, and Y is H when X is OR5 (wherein R5 represents hydrogen or a protective group, or R1 and R5 may together form a vicinal-diol protective group); synthesis intermediates useful in synthesizing these vitamin D derivatives; and medicinal compositions containing these vitamin D derivatives. <CHEM>