You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named N-[2-[6-(3-azabicyclo[3.1.0]hexan-3-yl)pyridin-3-yl]pyrimidin-4-yl]-2-[3-methyl-2,6-dioxo-1-(2-oxopropyl)purin-7-yl]propanamide by IUPAC nomenclature, provide its molecular formula.
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C26H27N9O4
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