2-(3-HYDROXYAZETIDIN-1-YL)ACETIC ACID   、                                                                                      4-((2-((4-cyanophenyl)amino)-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidine-4-yl)oxy)-3,5-dimethylbenzonitrile                                                                                                                                                              在
                                                                                                                                                                                 
N,N'-羰基二咪唑                                                                                                                                  作用下,
                                                                                                                                                                                                                            生成                                                 4-((2-((4-cyanophenyl)amino)-6-(2-(3-hydroxyazetidine-1-yl)acetyl)-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidine-4-yl)oxy)-3,5-dimethylbenzonitrile