Tofacitinib Impurity 101

(E) -ethyl 5-amino-2-cyano-3- ((3R,4R) -4-methyl-3- (methyl (7H-pyrrolo[2,3-d]pyrimidin-4-yl) amino) piperidin-1-yl) -5-oxopent-2-enoate

C21H27N7O3

425.48

Tofacitinib

(E) -ethyl 5-amino-2-cyano-3- ((3R,4R) -4-methyl-3- (methyl (7H-pyrrolo[2,3-d]pyrimidin-4-yl) amino) piperidin-1-yl) -5-oxopent-2-enoate