[(1S,2R,4R,6R,7S,8S,12R,13S,15S)-13-benzoyloxy-15-hydroxy-4-(4-methoxyphenyl)-7,18,18-trimethyl-11-methylidene-14-oxo-3,5-dioxatetracyclo[13.2.1.02,6.07,12]octadecan-8-yl] benzoate                                                                                                                                                              在
                                                                                                                                                                                 
二氯乙基铝                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
正己烷   、                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 3.0h,
                                                                                                                以88%的产率得到[(1S,2R,4S,5S,9R,10S,11S,12S)-10-benzoyloxy-2,11,12-trihydroxy-4,15,15-trimethyl-8-methylidene-3-oxo-5-tricyclo[10.2.1.04,9]pentadecanyl] benzoate