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 dimethyl 3-(3,3,5-trimethyl-4-oxo-2H-1,5-benzoxazepin-8-yl)-2,6-dihydro-1,3-oxazine-4,5-dicarboxylate is given. What is its corresponding molecular formula?
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C20H24N2O7
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