| 摘要 |
<p>Novel cholecalciferol and dihydrotachysterol3 derivatives produced against metabolic conversions at the 25-position, their preparation, pharmaceutical compositions, methods of treating steroid-induced osteoporosis, senile osteoporosis and secondary hyperparathyroidism, especially that induced by an insufficient amount of calcium in relationship to the amount of phosphate, novel intermediates and their preparation are disclosed.</p> |
