abstract |
(24S)- and (24R)-1a,25-Dihydroxyvitamin D 4 compounds and processes for preparing same. Ergosta-5,7- diene compounds which are useful intermediates in the synthesis of the 1α,25-dihydroxyvitamin D 4 compounds. The D 4 compounds are expected to possess an interesting pharmacological activity in association with the active-type vitamins D 3 and D 2 . |