发明人张德明,黄志刚,郑宇鹏. "Method for the Synthesis of Tofacitinib Impurity 87" [P]. 中国发明专利, 专利号 CN 115494705 B, 授权公告日 2017-03-10.
Sørensen M, Schröder R, Martínez F. "A Process for Preparing High-Purity Tofacitinib Impurity 87" [P]. European Patent, EP 3853663 A1, 2023-09-04.
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