You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 5-methyl-6-(3-methyl-3,4,6,7,8,8a-hexahydro-1H-pyrrolo[1,2-a]pyrazin-2-yl)-N-propylpyrimidin-4-amine is given. What is its corresponding molecular formula?
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C16H27N5
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