(3S,3'R)-3-[(tert-butyloxy)methyl]spiro[(dihydropyrazine-2,5-dione)-6,3'-(2',3'-dihydrothieno[2,3-b]naphtho-4',9'-dione)]                                                                                                                                                              在
                                                                                                                                                                                 
三氟乙酸                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                                                        以91%的产率得到(3S,3'R)-3-(hydroxymethyl)spiro[dihydropyrazine-2,5-dione-6,3'-(2',3'-dihydrothieno[2,3-b]naphtho-4',9'-dione)]