4-(4-oxo-2-phenyl-4H-chromen-6-yl)benzaldehyde   、                                                                                      
6,11-二氢-11-(1-甲基-4-哌啶亚基)-5H-苯并[5,6]环庚烷并[1,2-b]吡啶   、                                                                                      
苯甲醛   、                                                                                      
盐酸肌氨酸                                                                                                                                                                                                                                                                                                          以respectively, as in Example 22, Step C, the similar procedure afforded the title compound in 31% yield的产率得到methyl 1-(4-(4-oxo-2-phenyl-4H-chromen-6-yl)benzyl)azetidine-3-carboxylate