4-硝基过氧化苯甲酸   、                                                                                      12β-acetoxy-3,3-ethane-1,2-diyldioxy-(5α)-23-nor-con-20(22)-ene                                                                                                                                                                                                                                                                                                          生成                                                 
12β-acetoxy-3,3-ethane-1,2-diyldioxy-(5α)-23-nor-con-20(22)-ene 22-oxide   、                                                                                             12β-acetoxy-20,22-epoxy-3,3-ethane-1,2-diyldioxy-(5α,20β
H)-23-nor-conane   、                                                                                             
12β-acetoxy-20,22-epoxy-3,3-ethane-1,2-diyldioxy-(5α)-23-nor-conane