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-[(E)-N-[(5-acetylpyridin-2-yl)amino]-C-methylcarbonimidoyl]-N-butylbenzamide is given. What is its corresponding molecular formula?
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C20H24N4O2
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