You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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N-(1-azabicyclo[2.2.2]octan-3-yl)-4,4-dimethylpyrrolo[2,1-c][1,4]benzoxazine-6-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
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C21H25N3O2
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