5-甲基-3-氧代己酸甲酯   、                                                                                      tert-butyl(((2S,4aR,4bS,6aS,7aR,8aS,8bS,8cR,E)-7-ethylidene-4a,6a-dimethyl-2,3,4,4a,4b,5,6,6a,7,7a,8a,8b,8c,9-tetradecahydro-1H-naphtho[1',2':6,7]indeno[1,2-b]oxiren-2-yl)oxy)dimethylsilane                                                                                                                                                              在
                                                                                                                                                                                 C
6H
11O
3P                                                                                                                                  作用下,
                                                                                                                                                                                                                            生成                                                 
2-{(S)-1-[(3S,8R,9S,10R,13S,14S,15R)-3-(tert-Butyl-dimethyl-silanyloxy)-15-hydroxy-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl]-ethyl}-5-methyl-3-oxo-hexanoic acid methyl ester