<1(R),6S>-1,2,3,6-tetrahydro-4-methyl-6-(3-nitrophenyl)-2-oxo-1-<<(1-phenyl ethyl)amino>carbonyl>-5-pyrimidinecarboxylic acid, 1-methylethyl ester                                                                                                                                                              在
                                                                                                                                                                                 
三氟乙酸                                                                                                                                  作用下,
                                                                                                                                                                                        反应 4.0h,
                                                                                                                以72%的产率得到<6S>-1-(aminocarbonyl)-1,2,3,6-tetrahydro-4-methyl-6-(3-nitrophenyl)-2-oxo-5-pyrimidinecarboxylic acid, 1-methylethyl ester