(20S,22R,24R,25S,26R)-15α-acetoxy-5,6β:22,26-diepoxy-24,26-diethoxy-4β,25-dihydroxy-5β-ergostan-1-one                                                                                                                                                              在
                                                                                                                                                                                 jones reagent   、                                                                                                  
barium methoxide                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇   、                                                                                         
丙酮                                                                                  为溶剂,
                                                                                                                                                    反应 0.02h,
                                                                                                                生成                                                 (20S,22R,24R,25S,26R)-5,6β:22,26-diepoxy-24,26-diethoxy-25-hydroxy-5β-ergostane-1,4,15-trione