Acetic acid (2R,3R,4R,5R)-4-acetoxy-2-(6-benzoylamino-purin-9-yl)-5-((R)-1,2-diacetoxy-ethyl)-tetrahydro-furan-3-yl ester                                                                                                                                                              在
                                                                                                                                                                                 
sodium hydroxide                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙醇                                                                                  为溶剂,
                                                                                                                                                                                        以70%的产率得到N-{9-[(2R,3R,4S,5R)-5-((R)-1,2-Dihydroxy-ethyl)-3,4-dihydroxy-tetrahydro-furan-2-yl]-9H-purin-6-yl}-benzamide