ethyl 2-(1-{2-[8-chloro-6-(3,4-dimethoxy-2-pyridinyl)-4H,6H-pyrrolo[1,2-a][4,1]benzoxazepin-4-yl]acetyl}-4-piperidinyl)acetate 以
isopropyl alcohol-hexane 为溶剂,
以to give ethyl 2-(1-{2-[(4R,6R)-8-chloro-6-(3,4-dimethoxy-2-pyridinyl)-4H,6H-pyrrolo[1,2-a][4,1]benzoxazepin-4-yl]acetyl}-4-piperidinyl)acetate (27 mg) corresponding to a peak with a shorter retention time and ethyl 2-(1-{2-[(4S,6S)-8-chloro-6-(3,4-dimethoxy-2-pyridinyl)-4H,6H-pyrrolo[1,2-a][4,1]benzoxazepin-4-yl]acetyl}-4-piperidinyl)acetate (26 mg) corresponding to a peak with a longer retention time的产率得到ethyl 2-(1-{2-[(4R,6R)-8-chloro-6-(3,4-dimethoxy-2-pyridinyl)-4H,6H-pyrrolo[1,2-a][4,1]benzoxazepin-4-yl]acetyl}-4-piperidinyl)acetate