Ethyl 2-(4-{4-[(4R,6S)-8-chloro-6-(2,3-dimethoxyphenyl)-4H,6H-pyrrolo[1,2-a][4,1]benzoxazepin-4-yl]-3-hydroxybutanoyl}-1-piperazinyl)-2-oxoacetate 、 4-[(4R,6S)-8-Chloro-6-(2,3-dimethoxyphenyl)-4H,6H-pyrrolo[1,2-a][4,1]benzoxazepin-4-yl]-3-hydroxybutanoic acid 、
氮杂环丁烷-3-甲酸甲酯盐酸盐 以to give the title compound (98.5 mg)的产率得到methyl 1-{4-[(4R,6S)-8-chloro-6-(2,3-dimethoxyphenyl)-4H,6H-pyrrolo[1,2-a][4,1]benzoxazepin-4-yl]-3-hydroxybutanoyl}-3-azetidinecarboxylate