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Certificate of Analysis

Tofacitinib (CP-690550) Citrate

Molecular Formula:	C₁₆H₂₀N₆O.C₆H₈O₇
Molecular Weight:	504.49
CAS No.:	540737-29-9
Storage (From the date of receipt):	3 years -20°C powder
	1 year -80°C in solvent
Image:

HPLC: 99.99% purity | NMR: Consistent with structure