((2S,4aS,4bR,7S,8S,8aR)-7-Acetoxy-8-acetoxymethyl-2,4b,8-trimethyl-1,2,3,4,4a,4b,5,6,7,8,8a,9-dodecahydro-phenanthren-2-yl)-acetic acid methyl ester                                                                                                                                                              在
                                                                                                                                                                                 
Eosin Y   、                                                                                                  
氧气                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙醇                                                                                  为溶剂,
                                                                                                                                                    反应 24.0h,
                                                                                                                以600 mg的产率得到((2R,4aR,4bR,7S,8S,8aR,10R)-7-Acetoxy-8-acetoxymethyl-10-hydroxy-2,4b,8-trimethyl-2,3,4,4a,4b,5,6,7,8,8a,9,10-dodecahydro-phenanthren-2-yl)-acetic acid methyl ester