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)-3-[(Z)-(6-chloro-3,4-dihydro-2H-1,5-benzodioxepin-8-yl)methylideneamino]-5-methyl-5-phenylimidazolidine-2,4-dione is given. What is its corresponding molecular formula?
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C20H18ClN3O4
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