4-Amino-1-[(R)-5-(tert-butyl-diphenyl-silanyloxymethyl)-3-fluoro-2,5-dihydro-furan-2-yl]-5-fluoro-1H-pyrimidin-2-one                                                                                                                                                              在
                                                                                                                                                                                 
triethylamine tris(hydrogen fluoride)                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 5-fluoro-1-(2,3-dideoxy-2-fluoro-α-L-glycero-pent-2-enofuranosyl)cytosine   、                                                                                             5-fluoro-1-(2,3-dideoxy-2-fluoro-β-L-glycero-pent-2-enofuranosyl)cytosine