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