(3S)-3-[(3E,7Z,11E,15E)-8-fluoro-3,7,12,16,20-pentamethylhenicosa-3,7,11,15,19-pentaenyl]-2,2-dimethyloxirane                                                                                                                                                              在
                                                                                                                                                                                 recombinant A
. acidocaldarius squalene:hopene cyclase   、                                                                                                  
sodium citrate   、                                                                                                  Triton X-100                                                                                                                                  作用下,
                                                                                                                                                                                                                            以27%的产率得到(1R,4S)-2-[(3Z,7E,11E)-4-fluoro-3,8,12,16-tetramethylheptadeca-3,7,11,15-tetraenyl]-1,3,3-trimethyl-7-oxabicyclo[2.2.1]heptane