You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule (5R)-3-[(5-chloro-2,3-dihydro-1,4-benzodioxin-7-yl)methyl]-5-(4-methoxyphenyl)-5-methylimidazolidine-2,4-dione into molecular formula.
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C20H19ClN2O5
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