(5R,6R,8R,9S,10R,13S,14S)-6-[dimethyl(phenyl)silyl]oxy-10,13-dimethyl-2,4,5,6,7,8,9,11,12,14,15,16-dodecahydro-1H-cyclopenta[a]phenanthrene-3,17-dione                                                                                                                                                                                              以
                                                                                         
乙腈                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 3-[(4aS,4bR,8aR,9R,10aR)-9-[dimethyl(phenyl)silyl]oxy-2,4b-dimethyl-7-oxo-3,4,4a,5,6,8,8a,9,10,10a-decahydrophenanthren-1-yl]propanal   、                                                                                             (5R,6R,8R,9S,10R,13R,14S)-6-[dimethyl(phenyl)silyl]oxy-10,13-dimethyl-2,4,5,6,7,8,9,11,12,14,15,16-dodecahydro-1H-cyclopenta[a]phenanthrene-3,17-dione