You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 2-(1-bicyclo[2.2.2]octanylmethyl)-4-bromo-1-methylpyrrolo[3,2-c]pyridine-3-carboxamide into molecular formula.
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C18H22BrN3O
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