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 4-[2-[5,7-difluoro-6-(3,3,3-trifluoroprop-1-ynyl)naphthalen-2-yl]ethyl]-3,5-difluorophenol into molecular formula.
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C21H11F7O
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