2-formyl-3-(4-methylbenzyl)-5,5,8,8-tetramethyl-5,6,7,8-tetrahydronaphthalene   、                                                                                      ethyl 4-{(E)-2-[5,5,8,8-tetramethyl-3-(4-methylbenzyl)-5,6,7,8-tetrahydro-naphthalen-2-yl]vinyl}benzoate                                                                                                                                                                                                                                                                                                          以64%的产率得到4-{(E)-2-[5,5,8,8-tetramethyl-3-(4-methylbenzyl)-5,6,7,8-tetrahydro-naphthalen-2-yl]vinyl}benzoic acid