发明人郭海燕,孙丽萍,沈红梅. "Method for the Synthesis of 2-(3-(((((9H-fluoren-9-yl)methoxy)carbonyl)amino)methyl)cyclobutyl)acetic acid" [P]. 中国发明专利, 专利号 CN 114177506 B, 授权公告日 2017-02-05.
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