You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 5-(4,4-difluoro-3-oxohexyl)-2-(6-methylidene-2-oxopiperidin-3-yl)-3H-isoindol-1-one is given. What is its corresponding molecular formula?
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C20H22F2N2O3
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