4-Oxo-pentanoic acid (2S,3aR,4R,6R,6aS)-3a-hydroxy-4-hydroxymethyl-6-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-hexahydro-furo[3,4-b]furan-2-ylmethyl ester                                                                                                                                                              在
                                                                                                                                                                                 
吡啶   、                                                                                                  
N,N-二异丙基乙胺                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 4-Oxo-pentanoic acid (2S,3aR,4R,6R,6aS)-4-[bis-(4-methoxy-phenyl)-phenyl-methoxymethyl]-3a-[(2-cyano-ethoxy)-diisopropylamino-phosphanyloxy]-6-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-hexahydro-furo[3,4-b]furan-2-ylmethyl ester