甲基磺酰氯   、                                                                                      
1,7,11-trideacetyl-pyripyropene A                                                                                                                                                              在
                                                                                                                                                                                 
吡啶                                                                                                                                  作用下,
                                                                                                                                                                                        反应 0.5h,
                                                                                                                以6 mg的产率得到[(1S,2S,5S,6R,7R,9S,10S,18R)-5,9,18-trihydroxy-2,6,10-trimethyl-16-oxo-14-pyridin-3-yl-11,15-dioxatetracyclo[8.8.0.02,7.012,17]octadeca-12(17),13-dien-6-yl]methyl methanesulfonate