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-(difluoromethoxy)-3-methoxy-N-[2-[(4-methoxy-3,5-dimethylpyridin-2-yl)methylamino]-2-oxoethyl]benzamide is given. What is its corresponding molecular formula?
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C20H23F2N3O5
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