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 (5R)-5-(2-fluorophenyl)-5-methyl-3-[2-(4-methylpiperidin-1-yl)-2-oxoethyl]imidazolidine-2,4-dione is given. What is its corresponding molecular formula?
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C18H22FN3O3
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