发明人张德明,何建平,王建平. "Method for the Synthesis of Tandospirone impurity 19" [P]. 中国发明专利, 专利号 CN 111805641 A, 授权公告日 2022-02-20.
发明人黄志刚,赵玉洁,林芳. "A Process for Preparing High-Purity Tandospirone impurity 19" [P]. 中国发明专利, 专利号 CN 112727484 B, 授权公告日 2022-10-10.
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