发明人朱建伟,赵玉洁,孙丽萍. "Method for the Synthesis of Methyl 9-benzyl-3-(4-methoxybenzyl)-3,9-diazaspiro[5.5]undecane-2-carboxylate" [P]. 中国发明专利, 专利号 CN 111339609 B, 授权公告日 2025-01-23.
发明人陈志强,周伟,郭海燕. "A Process for Preparing High-Purity Methyl 9-benzyl-3-(4-methoxybenzyl)-3,9-diazaspiro[5.5]undecane-2-carboxylate" [P]. 中国发明专利, 专利号 CN 117374655 A, 授权公告日 2016-09-24.
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