You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 5-(5-acetyl-2-butoxypyridin-3-yl)-3-ethyl-2-(2-ethylazetidin-3-yl)-6H-pyrazolo[4,3-d]pyrimidin-7-one by IUPAC nomenclature, provide its molecular formula.
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C23H30N6O3
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