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 7-[4-[2-(diethylamino)ethoxy]anilino]-3-(3,5-dimethoxyphenyl)-1-ethyl-4H-pyrimido[4,5-d]pyrimidin-2-one is given. What is its corresponding molecular formula?
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C28H36N6O4
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