dimethyl (2RS,8aRS,10aRS)-10,12-dioxo-2,3,4,5,6,7,8,8a,9,10-decahydro-1H-2,10a-ethanophenanthrene-8,8-dicarboxylate                                                                                                                                                              在
                                                                                                                                                                                 
吡啶   、                                                                                                  sodium tetrahydroborate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙醇                                                                                  为溶剂,
                                                                                                                                                    反应 21.0h,
                                                                                                                生成                                                 
dimethyl (2RS,8aRS,10SR,10aRS,12SR)-10,12-dibenzoyloxy-2,3,4,5,6,7,8,8a,9,10-decahydro-1H-2,10a-ethanophenanthrene-8,8-dicarboxylate