You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 6-[2-(2,3-difluorophenyl)ethynyl]-2-(4-ethyl-2-fluorophenyl)-5-fluoro-1,2,3,4-tetrahydronaphthalene into molecular formula.
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C26H20F4
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