发明人周伟,杨光,韩伟. "Method for the Synthesis of 1-Azaspiro[4.4]nonane hydrochloride" [P]. 中国发明专利, 专利号 CN 110414176 B, 授权公告日 2015-03-11.
发明人赵玉洁,马晓峰,郭海燕. "A Process for Preparing High-Purity 1-Azaspiro[4.4]nonane hydrochloride" [P]. 中国发明专利, 专利号 CN 114711900 A, 授权公告日 2016-11-19.
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