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-[4-methyl-2,5-dioxo-4-(2-phenylethyl)imidazolidin-1-yl]-N-(2,3,4-trifluorophenyl)acetamide is given. What is its corresponding molecular formula?
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C20H18F3N3O3
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