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-ethoxy-N-[2-oxo-2-[(1-pyrimidin-2-ylpiperidin-3-yl)amino]ethyl]benzamide is given. What is its corresponding molecular formula?
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C20H25N5O3
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