You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named [2-chloro-5-(trifluoromethyl)pyridin-4-yl]-[(3S,4R)-4-methyl-3-(5-methyl-[1,2,4]triazolo[1,5-a]pyrimidin-7-yl)piperidin-1-yl]methanone by IUPAC nomenclature, provide its molecular formula.
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C19H18ClF3N6O
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