发明人韩伟,孙丽萍,罗永刚. "Method for the Synthesis of 2-Phenyl-2,7-diaza-spiro[4.4]nonane p-toluenesulfonate" [P]. 中国发明专利, 专利号 CN 113421020 B, 授权公告日 2019-01-01.
发明人孙丽萍,徐明华,唐晓军. "A Process for Preparing High-Purity 2-Phenyl-2,7-diaza-spiro[4.4]nonane p-toluenesulfonate" [P]. 中国发明专利, 专利号 CN 117979809 B, 授权公告日 2021-11-10.
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