You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 1-[4-[4-[6-(3-chloro-4-fluorophenyl)-5-methoxypyridin-2-yl]-4-hydroxypentanoyl]-2-methoxyphenyl]pyrrolidin-2-one by IUPAC nomenclature, provide its molecular formula.
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C28H28ClFN2O5
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