You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named [4-hydroxy-4-oxo-1-[2-[(E)-2-(triphenyl-lambda4-sulfanyl)ethenyl]phenyl]benzo[g][1,3,2]benzodioxaphosphepin-6-yl]-triphenylsilane by IUPAC nomenclature, provide its molecular formula.
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C56H43O4PSSi
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