1-{4-[(4R,6S)-8-chloro-6-(2,3-dimethoxyphenyl)-4H,6H-pyrrolo[1,2-a][4,1]benzoxazepin-4-yl]-3-hydroxybutanoyl}-3-azetidinecarboxylic acid 、 Ethyl 2-(1-{4-[(4R,6S)8-chloro-6-(2,3-dimethoxyphenyl)-4H,6H-pyrrolo[1,2-a][4,1]benzoxazepin-4-yl]-3-hydroxybutanoyl}-4-piperidinyl)acetate 、
potassium carbonate 以to give the title compound (51 mg)的产率得到2-(1-{4-[(4R,6S)-8-chloro-6-(2,3-dimethoxyphenyl)-4H,6H-pyrrolo[1,2-a][4,1]benzoxazepin-4-yl]-3-hydroxybutanoyl}-4-piperidinyl)acetic acid