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'-[(E)-(3-chloro-5-ethoxy-4-hydroxyphenyl)methylideneamino]-N-(4-methylphenyl)propanediamide is given. What is its corresponding molecular formula?
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C19H20ClN3O4
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