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 [3-[1-(dimethylamino)pyrrolo[1,2-a]pyrazin-3-yl]-3-methylpiperidin-1-yl]-pyrazin-2-ylmethanone into molecular formula.
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C20H24N6O
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