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发明人王建平,周伟,朱建伟. "Method for the Synthesis of Tofacitinib Impurity 56" [P]. 中国发明专利, 专利号 CN 109898751 B, 授权公告日 2024-05-17.
发明人高志强,朱建伟,钱学锋. "A Process for Preparing High-Purity Tofacitinib Impurity 56" [P]. 中国发明专利, 专利号 CN 115003559 A, 授权公告日 2015-08-12.
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