Certificate of Analysis

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Ritlecitinib (PF-06651600)

Molecular Formula:	C₁₅H₁₉N₅O
Molecular Weight:	285.34
CAS No.:	1792180-81-4
Storage (From the date of receipt):	3 years -20°C powder
Storage (From the date of receipt):	1 year -80°C in solvent
Image:

HPLC: 97.73% purity | NMR: Consistent with structure