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 N-[(Z)-(2,4-diethoxyphenyl)methylideneamino]-2-oxo-1-propan-2-ylpyridine-3-carboxamide is given. What is its corresponding molecular formula?
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C20H25N3O4
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