发明人张德明,朱建伟,孙丽萍. "Method for the Synthesis of Abemaciclib Impurity 39" [P]. 中国发明专利, 专利号 CN 116363659 A, 授权公告日 2022-09-21.
Lee S K, Davis P L, Thompson G K. "A Process for Preparing High-Purity Abemaciclib Impurity 39" [P]. US Patent, US 11188262 B2, 2022-03-21.
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