14α-formyl-4,4-dimethylcholest-7-en-3β-ol 3β-acetate                                                                                                                                                              在
                                                                                                                                                                                 (diethylamino)sulfur difluoride                                                                                                                                  作用下,
                                                                                                                                                                                        反应 3.0h,
                                                                                                                以25%的产率得到Acetic acid (3S,5S,9R,10R,13R,14S,17R)-14-difluoromethyl-17-((R)-1,5-dimethyl-hexyl)-4,4,10,13-tetramethyl-2,3,4,5,6,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl ester