英文别名Tofacitinib impurity 32; 1-{(3R,4R)-4-Methyl-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]-1-piperidinyl}ethanone; 1-[(3R,4R)-4-Methyl-3-(methyl-7H-pyrrolo[2,3-d]pyrimidin-4-ylamino)-1-piperidinyl]ethanone; Tofacitinib Impurity E; 3-Piperidinamine, 1-acetyl-N,4-dimethyl-N-1H-pyrrolo[2,3-d]pyrimidin-4-yl-, (3R,4R)- (9CI); Tofacitinib Impurity Z; 1-((3R,4R)-4-Methyl-3-(methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino)piperidin-1-yl)ethan-1-one; Tofacitib impurity Z; Ethanone, 1-[(3R,4R)-4-methyl-3-(methyl-7H-pyrrolo[2,3-d]pyrimidin-4-ylamino)-1-piperidinyl]-; 1-((3R,4R)-4-Methyl-3-(methyl(1H-pyrrolo[2,3-d]pyrimidin-4-yl)amino)piperidin-1-yl)ethan-1-one; Tofacitinib Citrate impurity Z 
