乙酸酐   、                                                                                      
methyl (1''E,5E,7E)-7-<6'-<3''-(tert-butyldimethylsiloxy)-1''-octenyl>-2',2'-dimethyl-4'-oxo-3'aβ,5',6'α,6'aβ-tetrahydro-4'H-cyclopenta-1',3'-dioxol-5'-ylidene>heptenoate                                                                                                                                                              在
                                                                                                                                                                                 
吡啶   、                                                                                                  
4-二甲氨基吡啶   、                                                                                                  
氢氟酸                                                                                                                                  作用下,
                                                                                                                                                                                                                            生成                                                 methyl (1"E,6E)-7-<6'-(3"-acetoxy-1"-octenyl)-2',2'-dimethyl-3'aβ,6'aβ-dihydro-4'H-cyclopenta-1',3'-dioxol-5'-yl>-6-heptenoate   、                                                                                             methyl (5E,7E,1"E)-7-<6'-(3"-acetoxy-1"-octenyl)-4'-oxo-2',2'-dimethyl-3'aβ,5',6'α,6'aβ-tetrahydro-4'H-cyclopenta-1',3'-dioxol-5'-ylidene>-5-heptenoate