diphenylisopropylsulfonium tetrafluoroborate   、                                                                                      
5-(1)-menthyloxy-2(5H)-furanone                                                                                                                                                                                                                                                                                                          生成                                                 
(1R,5S) 6,6-dimethyl-4(R)-[(1'S), (2'R), (5'S) 2'-isopropyl-5'-methyl-cyclohexanoxy]-3-oxabicyclo-(3,1,0)-hexan-2-one   、                                                                                             (1R,5S) 6,6-dimethyl-4(R)-[(1'S), (2'R), (5'S) 2'-isopropyl-5'-methyl-cyclohexanoxy]-3-oxabicyclo-(3,1,0)-hexan-2-one