(25S)-3β-(tert-butyldimethylsilyloxy)-26-(pivaloyloxy)-5α-cholest-7-ene                                                                                                                                                              在
                                                                                                                                                                                 
platinum(IV) oxide   、                                                                                                  
氢气   、                                                                                                  
溶剂黄146                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙酸乙酯                                                                                  为溶剂,
                                                                                                                                                    反应 48.0h,
                                                                                                                以94%的产率得到[(2S,6R)-6-[(3S,5S,9R,10S,13R,17R)-3-[tert-butyl(dimethyl)silyl]oxy-10,13-dimethyl-2,3,4,5,6,7,9,11,12,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl]-2-methylheptyl] 2,2-dimethylpropanoate