英文别名7H-Pyrrolo[2,3-d]pyrimidin-4-amine, N-Methyl-N-[(3R,4R)-4-Methyl-1-(phenylmethyl)-3-piperidinyl]-; 1H-Pyrrolo[2,3-d]pyrimidin-4-amine,N-Methyl-N-[(3R,4R)-4-Methyl-1-(phenylmethyl)-3-piperidinyl]-; N-Methyl-N-[(3R,4R)-4-methyl-1-(phenylmethyl)-3-piperidinyl]-7H-pyrrolo[2,3-d]pyrimidin-4-amine; Tasocitinib Intermediate; Tofacitinib impurity 6