(2S,4R)-2-(tert-Butoxycarbonylamino-methyl)-3-[2-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-acetyl]-thiazolidine-4-carboxylic acid methyl ester                                                                                                                                                              在
                                                                                                                                                                                 lithium hydroxide                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
1,4-二氧六环   、                                                                                         
水                                                                                  为溶剂,
                                                                                                                                                                                        以75%的产率得到(2S,4R)-2-(tert-Butoxycarbonylamino-methyl)-3-[2-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-acetyl]-thiazolidine-4-carboxylic acid