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 (E)-3-(5-bromofuran-2-yl)-1-[4-[(2,5-dimethoxyphenyl)methyl]piperazin-1-yl]prop-2-en-1-one is given. What is its corresponding molecular formula?
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C20H23BrN2O4
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