Tofacitinib impurity 59 (Standard)

2-Chloro-N-methyl-N- ((3R,4R) -4-methylpiperidin-3-yl) -7H-pyrrolo[2,3-d]pyrimidin-4-amine (Standard) is the analytical standard of 2-Chloro-N-methyl-N- ((3R,4R) -4-methylpiperidin-3-yl) -7H-pyrrolo[2,3-d]pyrimidin-4-amine. This product is intended for research and analytical applications.