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 1'-(3,4-dimethoxyfuran-2-carbonyl)-7-methylspiro[3,4-dihydro-1,4-benzoxazepine-2,4'-piperidine]-5-one into molecular formula.
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C21H24N2O6
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