发明人张德明,朱建伟,罗永刚. "Method for the Synthesis of Nintedanib Impurity 39" [P]. 中国发明专利, 专利号 CN 108341682 A, 授权公告日 2023-06-27.
发明人王建平,张德明,韩伟. "A Process for Preparing High-Purity Nintedanib Impurity 39" [P]. 中国发明专利, 专利号 CN 111597025 B, 授权公告日 2020-09-14.
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