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 2-(4-fluorophenyl)-2-methyl-N-[1-[3-(2-oxopyrrolidin-1-yl)phenyl]ethyl]propanamide is given. What is its corresponding molecular formula?
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C22H25FN2O2
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