4'-O-demethyl-4β-bromo-4-desoxypodophyllotoxin   、                                                                                      
(2S,3S)-2-Amino-3-methyl-pentanoic acid 5-(5-fluoro-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-pentyl ester                                                                                                                                                              在
                                                                                                                                                                                 
三乙胺                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 (2S,3S)-2-[(5S,5aS,8aR,9R)-9-(4-Hydroxy-3,5-dimethoxy-phenyl)-8-oxo-5,5a,6,8,8a,9-hexahydro-furo[3',4':6,7]naphtho[2,3-d][1,3]dioxol-5-ylamino]-3-methyl-pentanoic acid 5-(5-fluoro-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-pentyl ester