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For the molecule named N-[5-[5-amino-3-(difluoromethyl)-2,6-dihydro-1,4-oxazin-3-yl]-2,4-difluorophenyl]-5-cyanopyridine-2-carboxamide;hydrochloride by IUPAC nomenclature, provide its molecular formula.
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C18H14ClF4N5O2
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