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system
Name the molecular formula for the molecule established as 2-[[1-[2,4-difluoro-5-[2-[(3R)-3-hydroxy-1-methyl-2-oxopyrrolidin-3-yl]ethynyl]phenyl]-2-methoxyethyl]amino]pyrimidine-4-carboxamide using the IUPAC nomenclature.
user
C21H21F2N5O4
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