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 [4-[2-(4-acetyloxy-3-methylphenyl)-1,1,1,3-tetrafluoropropan-2-yl]-2-methylphenyl] acetate is given. What is its corresponding molecular formula?
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C21H20F4O4
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