(3E,4E)-3,4-bis[1-(2,5-dimethylthiophen-3-yl)ethylidene]oxolane-2,5-dione                                                                                                                                                                                              以
                                                                                         
甲苯                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 (8S,8aS)-8-(2,5-Dimethyl-thiophen-3-yl)-2,4,8,8a-tetramethyl-8,8a-dihydro-thieno[2',3':4,5]benzo[1,2-c]furan-5,7-dione   、                                                                                             
(3Z,4E)-3,4-bis[1-(2,5-dimethylthiophen-3-yl)ethylidene]oxolane-2,5-dione