Acetic acid (2R,3R,4S,5R)-4,5-diacetoxy-2-(2-methoxy-1-methyl-6-oxo-1,6-dihydro-purin-9-yl)-tetrahydro-pyran-3-yl ester                                                                                                                                                              在
                                                                                                                                                                                 
sodium methylate                                                                                                                                  作用下,
                                                                                                                                                                                        反应 0.33h,
                                                                                                                以53%的产率得到2-Methoxy-1-methyl-9-((2R,3R,4S,5R)-3,4,5-trihydroxy-tetrahydro-pyran-2-yl)-1,9-dihydro-purin-6-one