| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for producing a vitamin D derivative having a hydroxy group at 24 position. <P>SOLUTION: The method is provided for producing the vitamin D derivative expressed by general formula (6), in which R<SB>1</SB>, R<SB>2</SB>, R<SB>3</SB>and R<SB>4</SB>are mutually the same or different, representing a hydrogen atom or a protective group. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
