| 摘要 |
<p>Provided are 1, 25-dihydroxy-2-methylvitamin D3 derivatives expressed by the general formula (I), <CHEM> Äwherein each of R1 and R2 is independently a hydrogen atom or a tri(C1 to C7 alkyl)silyl group; herein configurations of asymmetric carbons at the 1-, 2- and 3-positions are each independently alpha -configuration or beta -configurationÜ and their production methods. The compound is useful as a treating agent for osteoporosis, rickets, hyperthyroidism, etc.</p> |
