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-(3-chlorophenyl)-N-[2-(4-methoxy-2-methyl-6-oxopyridin-1-yl)ethyl]benzamide is given. What is its corresponding molecular formula?
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C22H21ClN2O3
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