(8E,10E)-7,7-Dimethyl-4-phenylcarbamoyloxy-dodeca-8,10-dien-2-ynoic acid ethyl ester                                                                                                                                                              在
                                                                                                                                         
氯化二乙基铝                                                                                                                                                                          作用下,
                                                                                                                以
                                                                                         
甲苯                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 
(3R,5aR,8aS)-3,6,6-Trimethyl-3,5a,6,7,8,8a-hexahydro-naphtho[1,8-bc]furan-2-one   、                                                                                             (2R,4aR,8S)-2,5,5-Trimethyl-8-phenylcarbamoyloxy-2,4a,5,6,7,8-hexahydro-naphthalene-1-carboxylic acid ethyl ester   、                                                                                             (2R,4aR,8R)-2,5,5-Trimethyl-8-phenylcarbamoyloxy-2,4a,5,6,7,8-hexahydro-naphthalene-1-carboxylic acid ethyl ester