You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named ethyl 1-[3-[5-(2,4-difluorophenyl)-1,3-oxazol-2-yl]propanoyl]piperidine-4-carboxylate by IUPAC nomenclature, provide its molecular formula.
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C20H22F2N2O4
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