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 2-[4'-(2-hydroxyethoxy)spiro[1,5-dihydro-2,4-benzodioxepine-3,9'-thioxanthene]-3'-yl]oxyethanol is given. What is its corresponding molecular formula?
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C25H24O6S
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