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-fluoro-3-[2-oxo-2-[3-(trifluoromethyl)piperidin-1-yl]ethyl]-1,3-dihydroindol-2-one is given. What is its corresponding molecular formula?
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C16H16F4N2O2
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