ethyl 3-[11-(3-ethoxy-3-oxoprop-1-enyl)-5-tricyclo[8.2.2.24,7]hexadeca-1(12),4,6,10,13,15-hexaenyl]prop-2-enoate                                                                                                                                                              在
                                                                                                                                                                                 
sodium hydroxide                                                                                                                                  作用下,
                                                                                                                                                                                                                            以98%的产率得到(E)-3-[11-((E)-2-Carboxy-vinyl)-tricyclo[8.2.2.24,7]hexadeca-1(13),4,6,10(14),11,15-hexaen-5-yl]-acrylic acid