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 butyl 1-[2-[4-bromo-2-(3-fluorophenyl)sulfanylphenoxy]ethyl]pyrrolidine-2-carboxylate is given. What is its corresponding molecular formula?
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C23H27BrFNO3S
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