(1aR,4S,4aS,5S,8aR,9aS)-1a,2,3,4,4a,5,8a,9-octahydro-5-hydroxy-8a-methoxy-4,4a,6-trimethyl-7H-oxireno[8,8a]naphtho[2,3-b]furan-7-one                                                                                                                                                              在
                                                                                                                                                                                 
高氯酸                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃                                                                                  为溶剂,
                                                                                                                                                    反应 96.0h,
                                                                                                                以69%的产率得到(4S,4aS,5S,8S,8aS,9aR)-4a,5,6,7,8,8a,9,9a-octahydro-4,8,8a-trihydroxy-9a-methoxy-3,4a,5-trimethynaphtho[2,3-b]furan-2(4H)-one