(1S,2R,3E,7S,15Z,18R)-2-(methoxymethoxy)-7,20,20-trimethyl-6,19,21-trioxabicyclo[16.3.0]henicosa-3,15-dien-5-one                                                                                                                                                              在
                                                                                                                                                                                 palladium on barium sulfate   、                                                                                                  
氢气                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙酸乙酯                                                                                  为溶剂,
                                                                                                                                                                                        以70%的产率得到(1S,2R,3E,7S,18R)-2-(methoxymethoxy)-7,20,20-trimethyl-6,19,21-trioxabicyclo[16.3.0]henicos-3-en-5-one