发明人何建平,张德明,罗永刚. "Method for the Synthesis of 4-[2-(4-Methoxyphenyl)acetyl]-8-methyl-1-oxa-4-azaspiro[4.5]decane-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 109788515 B, 授权公告日 2019-05-02.
发明人何建平,杨光,钱学锋. "A Process for Preparing High-Purity 4-[2-(4-Methoxyphenyl)acetyl]-8-methyl-1-oxa-4-azaspiro[4.5]decane-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 116428663 A, 授权公告日 2018-07-14.
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