英文别名Tofacitinib Impurity 28; 3-[4-methyl-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]piperidin-1-yl]-3-oxopropanenitrile; rac-Tofacitinib (Mixture of Diastereomers); 4-Methyl-3-(methyl-7H-pyrrolo[2,3-d]pyrimidin-4-ylamino)-β-oxo-1-piperidinepropanenitrile; Tofacitinib Impurity 34 (Mixture of Diastereomers) 
