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-[1-[4-[(3,4-difluorophenyl)methoxy]phenyl]-5-oxopyrrolidin-3-yl]-2-oxoacetamide by IUPAC nomenclature, provide its molecular formula.
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C19H16F2N2O4
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