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Name the molecular formula for the molecule established as 1-[2-chloro-7-[2-(oxan-4-yl)propan-2-yl]pyrazolo[1,5-a]pyrimidin-6-yl]-3-[2-(trifluoromethyl)pyridin-4-yl]urea using the IUPAC nomenclature.
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C21H22ClF3N6O2
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