You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 4-[(4,6-dimethyl-2-oxo-1H-pyridin-3-yl)methyl]-6-methyl-7-(2-methylpyrazol-3-yl)-2,3-dihydro-1,4-benzoxazepin-5-one by IUPAC nomenclature, provide its molecular formula.
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C22H24N4O3
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