You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named N-methyl-4-[(1-phenylpyrazol-3-yl)methyl]-2,3-dihydro-1,4-benzoxazine-2-carboxamide by IUPAC nomenclature, provide its molecular formula.
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C20H20N4O2
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