| 摘要 |
PCT No. PCT/JP96/02369 Sec. 371 Date Feb. 26, 1998 Sec. 102(e) Date Feb. 26, 1998 PCT Filed Aug. 26, 1996 PCT Pub. No. WO97/08336 PCT Pub. Date Mar. 6, 1997A method for preparing at least one hydroxycholesterol chosen from the group consisting of 25-hydroxycholesterol, 17,25-dihydroxycholesterol and 25,26-dihydroxycholesterol by biological hydroxylation of cholesterol, and the aforementioned dihydroxycholesterols. In the above biological hydroxylation, a microorganism is used which has the abovementioned hydroxylation capacity and which belongs to the genus Amycolata and the genus Sphingomonas.
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