发明人张德明,何建平,沈红梅. "Method for the Synthesis of Solifenacin Impurity 28" [P]. 中国发明专利, 专利号 CN 109243271 A, 授权公告日 2019-04-26.
Klinger H, Davis P L, Roberts E F. "A Process for Preparing High-Purity Solifenacin Impurity 28" [P]. US Patent, US 10952109 B2, 2024-01-10.
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