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-[4-(chloromethyl)pyridin-2-yl]-3,4,6,7,8,8a-hexahydro-1H-pyrrolo[1,2-a]pyrazine into molecular formula.
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C13H18ClN3
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