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-[2-(3-bromopropoxy)-5-chloro-3-[4-(2-fluorophenyl)butoxy]-4-methoxy-6-methylphenyl]ethanone by IUPAC nomenclature, provide its molecular formula.
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C23H27BrClFO4
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