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-[2-(5-chloro-2-methoxyanilino)-2-oxoethyl]-N-methyl-3-(3-pyridin-3-yl-1,2,4-oxadiazol-5-yl)propanamide is given. What is its corresponding molecular formula?
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C20H20ClN5O4
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