Biphenyl-4-carboxylic acid (2R,3R)-3-acetoxy-3-acetoxymethyl-5-(4-isobutyrylamino-2-oxo-2H-pyrimidin-1-yl)-tetrahydro-furan-2-ylmethyl ester                                                                                                                                                              在
                                                                                                                                                                                 
氨                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 4-Amino-1-((2R,4R,5R)-4-hydroxy-4,5-bis-hydroxymethyl-tetrahydro-furan-2-yl)-1H-pyrimidin-2-one   、                                                                                             4-Amino-1-((2S,4R,5R)-4-hydroxy-4,5-bis-hydroxymethyl-tetrahydro-furan-2-yl)-1H-pyrimidin-2-one