4α-hydroxymethyl-5α-cholestan-3β-ol-THP ether                                                                                                                                                                                                                                                                                                          生成                                                 [(3S,4R,5S,8S,9S,10R,13R,14S,17R)-10,13-dimethyl-17-[(2R)-6-methylheptan-2-yl]-3-(oxan-2-yloxy)-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-4-yl]methyl methanesulfonate