Chemical Structure	CAT No.	CAS	Item Group	Purity
	C4X-1079140	N/A	Impurity
	Tofacitinib Impurity 140
	C4X-1079141	1245811-22-6	Impurity
	Tofacitinib Impurity 141 (Mixture of Tautomeric Isomers)
	C4X-1079142	1431697-80-1	Impurity
	Tofacitinib Impurity 142
	C4X-1079143	1206875-41-3	Impurity
	Tofacitinib Impurity 143
	C4X-1079144	2091669-67-7	Impurity
	Tofacitinib Impurity 144
	C4X-1079145	1092578-45-4	Impurity
	Tofacitinib Impurity 145
	C4X-1079146	2459302-75-9	Impurity
	Tofacitinib Impurity 146
	C4X-1079147	N/A	Impurity
	Tofacitinib Impurity 147
	C4X-1079148	N/A	Impurity
	Tofacitinib Impurity 148
	C4X-1079149	861612-04-6	Impurity
	Tofacitinib Impurity 149