Patel M V, Davis P L, O'Brien P Q. "一种托法替布杂质48的合成方法" [P]. US Patent, US 9513960 B2, 2019-05-24.
发明人罗永刚,何建平,马晓峰. "Method for the Synthesis of Tofacitinib Impurity 48" [P]. 中国发明专利, 专利号 CN 108561380 A, 授权公告日 2018-02-06.
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