发明人马晓峰,钱学锋,徐明华. "一种头孢泊肟酯杂质9的合成方法" [P]. 中国发明专利, 专利号 CN 117132139 A, 授权公告日 2018-01-08.
Mueller T, Stevens L M, Hughes D C. "Method for the Synthesis of Cefpodoxime Proxetil Impurity 9" [P]. US Patent, US 11819298 B2, 2023-12-28.
发明人赵玉洁,胡光,罗永刚. "A Process for Preparing High-Purity Cefpodoxime Proxetil Impurity 9" [P]. 中国发明专利, 专利号 CN 116236841 A, 授权公告日 2021-09-15.
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