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'-benzyl-N'-[(Z)-(3-methyl-5-oxo-1-phenylpyrazol-4-ylidene)methyl]acetohydrazide is given. What is its corresponding molecular formula?
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C20H20N4O2
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