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 3-[1-[2-(4-methoxyphenyl)ethyl]-2,5-dioxoimidazolidin-4-yl]-N-(6-methoxypyridin-3-yl)propanamide is given. What is its corresponding molecular formula?
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C21H24N4O5
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