You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Translate the chemical IUPAC name 1-[(1-methylpyrazol-4-yl)methyl]-4-(oxolane-2-carbonyl)-6-(pyridin-3-ylmethoxy)-1,4-diazepan-2-one into its molecular formula.
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C21H27N5O4
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