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 3-(1,2,3,4,4a,5,7,7a-octahydropyrrolo[3,4-b]pyridin-6-yl)-1-propan-2-ylpyrazin-2-one is given. What is its corresponding molecular formula?
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C14H22N4O
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