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 4-[4-(4-ethoxyphenyl)-6-oxopyrimidin-1-yl]-N-[4-(tetrazol-1-yl)phenyl]butanamide is given. What is its corresponding molecular formula?
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C23H23N7O3
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