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 1-[4-[4-(2,3-dihydro-1-benzofuran-5-yl)piperazin-1-yl]butyl]indole-6-carbonitrile is given. What is its corresponding molecular formula?
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C25H28N4O
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