N-(9-((5S,6R,8R,9R)-9-hydroxy-8-(hydroxymethyl)-1,7-dioxaspiro[4.4]nonan-6-yl)-6-methoxy-9H-purin-2-yl)acetamide                                                                                                                                                              在
                                                                                                                                                                                 
甲醇   、                                                                                                  
sodium methylate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                    反应 24.0h,
                                                                                                                以62%的产率得到(5S,6R,8R9R)-6-(2-amino-6-methoxy-9H-purin-9-yl)-8-(hydroxymethyl)-1,7-dioxaspiro[4.4]nonan-9-ol