27,28,29,30-tetramethyl-8,22-bis(methylsulfinyl)pentacyclo[21.3.1.13,7.110,14.116,20]triaconta-1(26),3,5,7(30),10,12,14(29),16(28),17,19,23(27),24-dodecaen-2-one   、                                                                                      27,28,29,30-tetramethyl-8,21-bis(methylsulfinyl)pentacyclo[21.3.1.13,7.110,14.116,20]triaconta-1(26),3,5,7(30),10,12,14(29),16(28),17,19,23(27),24-dodecaen-2-one   、                                                                                      
N-甲基吡咯烷酮                                                                                                                                                                                                                                                                                                          以39%的产率得到