发明人韩伟,马晓峰,孙丽萍. "Method for the Synthesis of tert-Butyl 2-(4-methoxybenzyl)-3,5-dioxo-2,9-diazaspiro[5.5]undecane-9-carboxylate" [P]. 中国发明专利, 专利号 CN 108964896 B, 授权公告日 2018-04-02.
发明人唐晓军,徐明华,周伟. "A Process for Preparing High-Purity tert-Butyl 2-(4-methoxybenzyl)-3,5-dioxo-2,9-diazaspiro[5.5]undecane-9-carboxylate" [P]. 中国发明专利, 专利号 CN 114558804 B, 授权公告日 2015-10-03.
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