发明人郑宇鹏,郭海燕,杨光. "Method for the Synthesis of tert-Butyl 7-(4-cyanobenzyl)-2,7-diazaspiro[4.4]nonane-2-carboxylate" [P]. 中国发明专利, 专利号 CN 117592573 A, 授权公告日 2020-06-07.
发明人韩伟,王建平,高志强. "A Process for Preparing High-Purity tert-Butyl 7-(4-cyanobenzyl)-2,7-diazaspiro[4.4]nonane-2-carboxylate" [P]. 中国发明专利, 专利号 CN 116618060 B, 授权公告日 2017-11-21.
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