英文别名7H-Pyrrolo[2,3-d]pyrimidin-4-amine, 2-chloro-N-methyl-N-[(3R,4R)-4-methyl-3-piperidinyl]-; Tofacitinib impurity 59; Tofacitinib Impurity 2; 2-chloro-N-methyl-N-[(3R,4R)-4-methyl-3-piperidyl]-7H-pyrrolo[2,3-d]pyrimidin-4-amine; N-((3R,4R)-4-methyl-piperidin-3-yl)-N-methyl-2-chloro-7H-pyrrolo[2,3-D]pyrimidine-4-amine; Tofacitinib Imp.E; Tofatinib Impurity E 
