发明人黄志刚,郭海燕,高志强. "Method for the Synthesis of 2-Ethyl-2-[[(9H-fluoren-9-ylmethoxy)carbonyl]amino]butanoic acid" [P]. 中国发明专利, 专利号 CN 115941216 A, 授权公告日 2019-09-19.
发明人唐晓军,周伟,沈红梅. "A Process for Preparing High-Purity 2-Ethyl-2-[[(9H-fluoren-9-ylmethoxy)carbonyl]amino]butanoic acid" [P]. 中国发明专利, 专利号 CN 117751599 B, 授权公告日 2024-08-26.
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