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 1-ethyl-7-[2-(3-methoxyphenyl)-2-oxoethyl]-3-naphthalen-1-ylpurine-2,6-dione is given. What is its corresponding molecular formula?
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C26H22N4O4
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