发明人孙丽萍,罗永刚,马晓峰. "Method for the Synthesis of 4-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)piperidine-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 116475645 B, 授权公告日 2018-07-14.
发明人赵玉洁,周伟,钱学锋. "A Process for Preparing High-Purity 4-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)piperidine-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 114230153 B, 授权公告日 2018-01-07.
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