You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named ethyl 4-[(E)-2-[4-[8-[4-[(E)-2-(4-ethoxycarbonylphenyl)ethenyl]phenyl]-3,6-bis[4-[(E)-2-(4-ethylphenyl)ethenyl]phenyl]pyren-1-yl]phenyl]ethenyl]benzoate by IUPAC nomenclature, provide its molecular formula.
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C82H66O4
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