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 2-(5,5-dimethyl-2,4-dioxoimidazolidin-1-yl)-N-[3-[(3-fluorophenyl)methoxy]phenyl]acetamide is given. What is its corresponding molecular formula?
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C20H20FN3O4
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