Certificate of Analysis

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EPZ-6438 (Tazemetostat)

Molecular Formula:	C₃₄H₄₄N₄O₄
Molecular Weight:	572.74
CAS No.:	1403254-99-8
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: 99.90% purity | NMR: Consistent with structure