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system
Name the molecular formula for the molecule established as N-(3-chloro-4-fluorophenyl)-3-(3,3-difluoropyrrolidin-1-yl)-6-methyl-6,7-dihydro-4H-pyrazolo[1,5-a]pyrazine-5-carboxamide using the IUPAC nomenclature.
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C18H19ClF3N5O
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