17β-[(N,N-dimethylcarbamoyl)thio]carbonyl-9,11-epoxy-17α-[(2-furanylcarbonyl)oxy]-16α-methyl-3-oxoandrosta-1,4-diene                                                                                                                                                              在
                                                                                                                                                                                 
甲醇   、                                                                                                  
potassium carbonate                                                                                                                                  作用下,
                                                                                                                                                                                        反应 5.0h,
                                                                                                                以83%的产率得到9,11-epoxy-17α-[(2-furanylcarbonyl)oxy]-17α-hydroxy-16α-methyl-3-oxoandrosta-1,4-diene-17β-carbothioic acid