You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N'-[(Z)-[5-chloro-2-[2-(2,3-dichloroanilino)-2-oxoethoxy]phenyl]methylideneamino]-N-cyclopropyloxamide is the IUPAC name of a molecule. Please give its molecular formula.
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C20H17Cl3N4O4
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