You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 3-[5,7-dimethyl-2-(trifluoromethyl)-[1,2,4]triazolo[1,5-a]pyrimidin-6-yl]-1-(4-pyrrolidin-1-ylpiperidin-1-yl)propan-1-one by IUPAC nomenclature, provide its molecular formula.
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C20H27F3N6O
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