You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 5-[2-(3-chloro-2-fluorophenyl)-3-(4-chloro-2-fluorophenyl)-4-(2,2-dimethylpropyl)pyrrolidine-1-carbonyl]-1H-pyridin-2-one by IUPAC nomenclature, provide its molecular formula.
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C27H26Cl2F2N2O2
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