5-[(5E,7E,9E)-13-Furan-3-yl-2,6,10-trimethyl-trideca-5,7,9-trien-(Z)-ylidene]-4-hydroxy-3-methyl-5H-furan-2-one                                                                                                                                                                                              以
                                                                                         
苯                                                                                  为溶剂,
                                                                                                                                                    反应 1.0h,
                                                                                                                以72%的产率得到(2R,3'S)-5'alpha-[(E)-5-(3-呋喃基)-2-甲基-1-戊烯基]-1',2',3',3'aalpha,5',7'abeta-六氢-3-羟基-3'alpha,4,7'-三甲基螺[呋喃-2(5H),4'-[4H]茚]-5-酮