二甲基(3,3-二甲基-2-氧代庚基)膦酸酯   、                                                                                      
((1R,2R,3R,4S)-4-Acetoxy-2-formyl-3-methyl-cyclopentyl)-acetic acid methyl ester                                                                                                                                                              在
                                                                                                                                                                                 sodium hydride                                                                                                                                  作用下,
                                                                                                                                                                                                                            生成                                                 [(1R,2S,3R,4S)-4-Acetoxy-2-((Z)-4,4-dimethyl-3-oxo-oct-1-enyl)-3-methyl-cyclopentyl]-acetic acid methyl ester   、                                                                                             [(1R,2S,3R,4S)-4-Acetoxy-2-((E)-4,4-dimethyl-3-oxo-oct-1-enyl)-3-methyl-cyclopentyl]-acetic acid methyl ester